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Discussion in 'The Garage' started by FWP, Feb 5, 2007.
Just for fun. 6000 lb Blazer, 3.73 gears, TH350, 33" tires.
I have 5500lb truck, 5.13's, th400, and 37 inch tires. I can turn them off the line pretty easily, not smoke, but chirp for a few rotations. Check out the videos here to see the burnouts, and watch the race video for great audio of them spinning off the line from a punch with no brake stand.
Torque is what you're really going to want, but I'd say 300HP/ 350TQ would get 'em spinning, and anything more than that would only make it easier. If I were building a engine from the ground up, I'd shoot for at least 350HP/ 400TQ, which is easily attainable from a 350 or 383 with Vortec heads. With good heads and a roller cam, 400/500 isn't too hard to do, especially if you start with a 400 or BBC. For a BBC, I'd want 500+ TQ.
Got Dyno #'s?
I'm gonna build an SBC.
Nates new Blazer will do that with a healthy 350 ( no Nate I don't believe its a 305 ) 4.10's , and a th350 with a 2000 rpm stall converter . Its more of a weight issue in a truck .
fred, my yellow truck comes damn close to smoken em off the line.. dont know what it is about it, but i can get a few chirps out.. 33's 4.10's and a 700r4 with a mild 350 tbi motor.... Heres some specs that could get you some smoken power from a dead stop.. ive had this combo in two trucks in the past
start with a fresh or low miles 350, add vortec heads (or the good 305HO heads)with a comp XE 262 cam, about 9.8:1 compression (runs FINE on pump gas with the vortec heads), a edelbrock performer rpm intake and a good tuned edelbrock or a holley, i had 4.11's with 35's and a Th350 203 combo.. used to blow the tires off when leaving school in the afternoons with no power brakes or anything, had raw torque... the 305 heads i had on it didnt really make that much top end power, but BOY O BOY was it peppy around town... i think i even have a picture of me smoken em from roll with some cheap 31's, but this was all on a truck, much less weight in the rear than a blazer.. so it may take more with a blazer... Nate
I wouldn;t run 305 heads when new vortecs are cheaper than a remanned set of stockers at Sumitt or Jegs .
about 350hp and 500tq or so
Why Vortec heads? Why not Aluminum aftermarket?
If you want to spend that much , go for it
AFR , World Products , take your pic
Vortec's are the best heads for the price. Many of the aluminum heads flow better, but they cost several hundred dollars more. If you can afford aluminum, look at Brodix's IK180's (about a grand), or if you have a bit more to spend, AFR's 180's.
Fred, you can get whatever you please, but make sure it has a low cc intake port, anything bigger than 175 is gonna kill your bottom end torque, the vortecs have a fast burn swirl type chamber and it is AWESOME for making some killer power... Nate
btw, paul is wrong here, i ran the numbers on the block and both heads, they all match to a early 80s smogger 305... but as everyone knows i do have some goodies on and in it... HAHA>> NATE
You are going to have trouble finding a set of aluminum heads with Intake runners smaller than 180CC. The only ones that come to mind are the L98 vette heads, and they don't flow until you really work them. Vortecs are around 170CC, I've read they actually measure closer to 165CC.
coulda swore the gm casting fast burns were 170 cc's when all said and done... ill hafta double check.. either way, 180 is kewl, wouldnt go more than that though.. i had 210's on my STRICKLY race truck and it killed the bottom end power but i gained it back in the 2nd part of the 1/4 mile
The Fastburn is 210cc. To see the difference between heads on a 350 (in this case, crate engines from GMPP), the ZZ4 and Fastburn 385 are the same shortblock (and cam) with different heads. The ZZ4 (with L98 Corvette TPI heads) is around 355HP and 410TQ, and the Fastburn is around 385/385. The aftermarket aluminum head's better flow usually makes up for the larger runner- if the head flows well. In this case the FB's runner is just too large. That being said, if you're looking at aluminum, you can do much better than either set. The Vortec heads will make just as much power as either one- more in most cases.
Sheesh What a discussion Informative though
Just go out and buy some bias ply truck highway tires. About 6.75" width. Brake Stand and smoke the poo-poo out of them!
Edit to Add:
A cup of bleach over both rear tires to be sure
Yah...we know about smokin' tires, eh?
I can't get this black stuff off my arms...
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