454 tbi questions

[big_truxx]

Geez, what do they inspect for ... properly inflated tires, operable sun visors?? Here in CA, it's a whole different game. You keep it stock, dead stock. If you change a thing, you need to have papers from CARB (California Air Research Board ... or Big Asshats) saying that part is acceptable on your year vehicle and then you have to take your rig to a state referee who decides if it is OK or not. And if you think those guys have a clue about what they are doing .... think again. The CA law has gone back and forth a few times over the last few years regarding the cut off years for smog testing. It was 75, then 76 and now back to 75. It was never 74 .... I tried to register a 74 and was told it needed to be smogged. The computers used to smog vehicles are wired by modem directly to the CA DMV and there are no provisions for 74, I couldn't smog it even if I wanted to! I spent 1/2 an hour explaining it to them and no luck. I had to reschedule an appointment, go home, go to THEIR website and print their law out and bring it back. Crap like that just pisses me off when I think about all the hard earned money we pay in taxes.

Sorry ... go off track a bit .... you can have your post back

Good Luck!

Eric M.

Read as: California is GAY!!!


Yeah I agree whole-heartedly!

And btw how did you know they checked for proper tire inflation and working sun visors? Are you a commie spying on me here in Maine?

They do checks for things like front end is safe and exhaust and body a bunch of stuff. But I do not think even my 82 should have passed w/o cats. Just sometimesget away with things like that.

 

[big_truxx]

to flog a dead thread again

When it comes to selecting cams for TBI BE CAREFULL. Your best bet is to call Comp and tell them what you goals are and what you application is and they can hook you up. But the rule of thumb is you can't get a cam with much more duration than 212* @ .050" without custom tuning.

wanna run :

Brand: Summit
Product Line: Summit Camshafts
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,500-4,000 RPM
Intake Duration 050 inch Lift: 208
Exhaust Duration 050 inch Lift: 218
Duration at 050 inch Lift: 208 int./218 exh.
Advertised Intake Duration: 266
Advertised Exhaust Duration: 276
Advertised Duration: 266 int./276 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.475
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.500
Valve Lift with Factory Rocker Arm Ratio: 0.475 int./0.500 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash (in): 0.000
Exhaust Valve Lash (in): 0.000
Computer Controlled: No
Quantity: Sold individually.

Camshaft, Hydraulic Flat Tappet, Advertised Duration 266/276, Lift .475/.500, Chevy Big Block, Each



just have to once again decide if i wanna keep that tbi (if it is easy enough and cheap and simple) or throw on a predator and not worry about it. headers are a must for it.

 

[dirtwarrior17]

depending on what headers you get you might not even have to do that.

Tbi needs EVERY sensor it allready has except knock sensor. Good mods would be intake manifold, exhaust/headers, adjustable fuel pressure regulator, and a computer cam. That should get you around 350 hp at the flywheel but depending on what cam you get you might need some computer tuning. This can be done for about 300-400 bucks at a shop but around here its almost impossible to find a shop that can do it in house... most of them will take a dyno run and send it off to a bigger company and have them burn it then it comes back to you in about 2 weeks.

just have to once again decide if i wanna keep that tbi (if it is easy enough and cheap and simple) or throw on a predator and not worry about it. headers are a must for it.

Dude like thunder said it'll cost you about 5 bucks to keep the tbi and run headers... some already have the o2 bung.

Over here in cali they say if the vehicle came with efi you CAN'T put a carb on it. Don't know if its the same in maine but you might want to check it out before you switch to a carb.

 

[big_truxx]

http://coloradok5.com/forums/showthread.php?t=146711

this is my new post.

as it says can someone explain to me why there is no 02 sensor?

 

[big_truxx]

http://coloradok5.com/forums/showthread.php?t=146711

this is my new post.

as it says can someone explain to me why there is no 02 sensor?

disregard crisis overted found the o2 sensor some people's kids.. i swear

 

[big_truxx]

Good mods would be intake manifold, exhaust/headers, adjustable fuel pressure regulator, and a computer cam. That should get you around 350 hp at the flywheel but depending on what cam you get you might need some computer tuning. This can be done for about 300-400 bucks at a shop but around here its almost impossible to find a shop that can do it in house... most of them will take a dyno run and send it off to a bigger company and have them burn it then it comes back to you in about 2 weeks.

dunno about compuer tuning sounds like more money being spent to keep the stock tbi. but computer tuning is something i know nothing about anyway. but know i could buy a nice intake for less than the 3-400 cost as for a computer cam. again i do not know about that. i was thinking the summit 1300 bbc cam would work good. once again i do not know about tbi/electical things.. as i am sure everyone knows now and is laughing at me

so as it stands now;

-would like to put in headers (must) and yes i know tbi will work fine once i weld in a bung
-summit 1300 bbc cam
-head work in way of porting and larger valves maybe

but if it is going to end up too much trouble and all for me i may end up with a nice intake and a predator lol as far as maine allowing carbed after efi... don't think they notice or care.

 

[dirtwarrior17]

dunno about compuer tuning sounds like more money being spent to keep the stock tbi. but computer tuning is something i know nothing about anyway. but know i could buy a nice intake for less than the 3-400 cost as for a computer cam. again i do not know about that. i was thinking the summit 1300 bbc cam would work good. once again i do not know about tbi/electical things.. as i am sure everyone knows now and is laughing at me

so as it stands now;

-would like to put in headers (must) and yes i know tbi will work fine once i weld in a bung
-summit 1300 bbc cam
-head work in way of porting and larger valves maybe

but if it is going to end up too much trouble and all for me i may end up with a nice intake and a predator lol as far as maine allowing carbed after efi... don't think they notice or care.

Well i don't know much about bbc efi but i learned alot about burning chips and sbc efi during my swap. Yeah you can buy a nice manifold with the 3-400 but then you have to buy a carb... The offset will only be something like 150 bucks to keep the efi. You may not even need to get it tuned if you get the right cam.

A computer cam is just a cam that was built to work with the stock computer so you don't have to tune it.

Carbs may be oldschool cool but you lose power in the mountains and they stall on steep hills not to mention worse gas mileage. I know q-jets are the answer but there are still angles q jets won't work on...

oh yeah if anybody is gonna say tbi stall on hills too, they need to fill up their gas tank.

 

[big_truxx]

Well i don't know much about bbc efi but i learned alot about burning chips and sbc efi during my swap. Yeah you can buy a nice manifold with the 3-400 but then you have to buy a carb... The offset will only be something like 150 bucks to keep the efi. You may not even need to get it tuned if you get the right cam.

A computer cam is just a cam that was built to work with the stock computer so you don't have to tune it.

Carbs may be oldschool cool but you lose power in the mountains and they stall on steep hills not to mention worse gas mileage. I know q-jets are the answer but there are still angles q jets won't work on...

oh yeah if anybody is gonna say tbi stall on hills too, they need to fill up their gas tank.

so you did an sbc tbi swap?

as for the cam it would be more expensive to get a computer cam wouldnt it? i know summits are cheap or would the summit 1300 i want work u think?

asfor the tbi stalling that was funny.

 

[big_truxx]

have decided tbi is in fact cool and may be workable. i just need to research further and see where i can get a throttle bodie for my truck aftermarket and also think about porting/big valving of heads. and also contemplating the worth of raising my comp ratio and needing a higher octane fuel with todays costs... oh and one important thing i need to learn. computer cams and if the summit cam 1300 i want would work w/o burning me a computer... kinda dont wanna custom chip job. just a mild work over (ya know cam headers nice exhaust, andmaybe head work with a potential new tbi intake and possibly tb).

 

[dirtwarrior17]

yup... so far it has a holley 670 cfm with 85 pph injectors(basically a 454 tbi on a sbc), accel high pressure fuel pump, holley 2" efi projection intake manifold, headers, 10:1 compression, camel hump heads, l-79 cam, k and n with xtreme lid, and a 3" single exhuast. Instead of having a chip burned i decided to go with a custom efi setup where i can burn my own fuel maps. Its more expensive but worth it.

http://www.cardomain.com/ride/805335

As for the computer cam it should cost the same as a regular cam or less.

Jegs has a good computer cam for 179. It should be exactly what your looking for... "better tq and hp for towing thoughout the entire power range" 1200-4200 rpm Hydraulic flat tappet.

specs are 262/270 dur and 468/485 lift. call up crane cams and tell them what you want and they will tell you if it will work with the computer and other mods.

The new tbi may not be necessary(don't know much about bbc efi), you might just need some bigger injectors or get the old one bored out, but the stock manifold will restrict power numbers for sure.

As for raising the comp ratio, i wouldn't do it unless you have another car to drive. right now with my 10:1 it costs me roughly 80 bucks to fill up my tank. . Thats another reason why i want to put some 76cc darts on it. power gains from raising comp. ration 2 points is only about 20 hp on a sbc.

 

[big_truxx]

yup... so far it has a holley 670 cfm with 85 pph injectors(basically a 454 tbi on a sbc), accel high pressure fuel pump, holley 2" efi projection intake manifold, headers, 10:1 compression, camel hump heads, l-79 cam, k and n with xtreme lid, and a 3" single exhuast. Instead of having a chip burned i decided to go with a custom efi setup where i can burn my own fuel maps. Its more expensive but worth it.

http://www.cardomain.com/ride/805335

As for the computer cam it should cost the same as a regular cam or less.

Jegs has a good computer cam for 179. It should be exactly what your looking for... "better tq and hp for towing thoughout the entire power range" 1200-4200 rpm Hydraulic flat tappet.

specs are 262/270 dur and 468/485 lift. call up crane cams and tell them what you want and they will tell you if it will work with the computer and other mods.

The new tbi may not be necessary(don't know much about bbc efi), you might just need some bigger injectors or get the old one bored out, but the stock manifold will restrict power numbers for sure.

As for raising the comp ratio, i wouldn't do it unless you have another car to drive. right now with my 10:1 it costs me roughly 80 bucks to fill up my tank. . Thats another reason why i want to put some 76cc darts on it. power gains from raising comp. ration 2 points is only about 20 hp on a sbc.

i thought my stock tbi was a 660cfm anyway and specs are for sum 1300 bbc cam;

SUM-1300 $61.95
Estimated Ship Date: Tomorrow
Warnings Application Suggested Parts Show All

Brand: Summit
Product Line: Summit Camshafts
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,500-4,000 RPM
Intake Duration 050 inch Lift: 208
Exhaust Duration 050 inch Lift: 218
Duration at 050 inch Lift: 208 int./218 exh.
Advertised Intake Duration: 266
Advertised Exhaust Duration: 276
Advertised Duration: 266 int./276 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.475
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.500
Valve Lift with Factory Rocker Arm Ratio: 0.475 int./0.500 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash (in): 0.000
Exhaust Valve Lash (in): 0.000
Computer Controlled: No
Quantity: Sold individually.

Camshaft, Hydraulic Flat Tappet, Advertised Duration 266/276, Lift .475/.500, Chevy Big Block, Each


it is listed till 90 for the engines so i dunno... still having to look into the whole tbi and cam thing.

 

[dirtwarrior17]

Yeah but im running a small block chevy with a 670 cfm tbi... your running a big block chevy with a 660cfm tbi. I was saying its basically a 454 tbi but its market as a small block upgrade.

I don't know about the cam...

 

[big_truxx]

also summit had no comp compatablie cams listed on the web site for bbc (not just summit brand but no comp compat cams for bbc) but i checked the specs against the summit cam lower duration for sbc and the comp compat cam for sbc and they were close. so i would imagine the 1300 bbc cam would be fine and at the price of $61 just a mild wake me up cam is all i wanted lol and not a big blown away budget

 

[big_truxx]

Yeah but im running a small block chevy with a 670 cfm tbi... your running a big block chevy with a 660cfm tbi. I was saying its basically a 454 tbi but its market as a small block upgrade.

I don't know about the cam...

sorry bro.. did in no way mean to cause confusion. i was saying that i thought the bbc tbi was 660cfm... i do not know what a stock sbc tbi is rated for in cfm... what is it?
and i think the cam will work out fine. guess only one way to find out; ask an engine shop when i have them rebuild the engine lol i wanna rebuild myself but am concerned as i have not done so before and do not wanna ruin it. i am sure i could do it with the propper research and preparations but still... is my 1st 454 and just wanna get it rebuild with a mild part here and there to make her roar.

the stock 454 seetup in that truck would smoke all 4 rear tires and bring the truck around sideways and was a ball when new... adding just a pinch here and a dash there should make it funner

 

[dirtwarrior17]

.... notice the basically a 454 tbi...

Jegs has the computer cam but like you said its gonna put a dent in your budget. Just make sure you check it out before you start clickin.


I could probably get my junk to spin all four 35's in four low, maybe 4hi, but i bet my 10b's would give me a big fock you and blow up as soon as i cracked the throttle..

it doesn't take much to wake up a bbc.... should be a stout motor.

Good luck man...

 

[big_truxx]

.... notice the basically a 454 tbi...

Jegs has the computer cam but like you said its gonna put a dent in your budget. Just make sure you check it out before you start clickin.


I could probably get my junk to spin all four 35's in four low, maybe 4hi, but i bet my 10b's would give me a big fock you and blow up as soon as i cracked the throttle..

it doesn't take much to wake up a bbc.... should be a stout motor.

Good luck man...

i know i used to imress friends w/ 4 rear wheel brake stands in highschool lol but also like i posted the sum 1300 cam seems very safe enough and is really not too agressive in its duration. very similar to both the comp compatable cam and the low end sbc summit cam. and the truck has a 14ff narrow or dana 70. so either one will take the abuse and also th400 tranny of course. which we all know is sweet. hey sexxah

may have to check out jegs at some point too