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Second gen chevy to cummins power, how-to post

Cam - the dimensional layout of the engine is GREAT !
Thanks for sharing . I printed a copy resized it to 400% and put it on a HUGE printer at work - I now have a easily read printed version that I can hang on the garage wall while I am invloved with this project.
Thanks again !
Tom
 
and you like what??? dont want to share with your bro's???

Im glad tom... good idea about blowing it up... I still have to figure how to open mine...... j/k


Ok a little update for the thread


Ken Kraus from autoworld ( as listed earlier in this thread) responded to me about the pictures of the motor on the stand... its his mockup motor... they make brackets to order.. pretty much any configuration you want to run,,,

I really like the a/c alternator setup and Ill be copying it (thanks ken)... I dont see why I cant keep the chevy alt. & a/c in their factory location.. there appears to be plenty of room and place to hang the brackets

Ken gets about 250.00 for a set of accessory brackets and a little bit more for motor mounts... I am told by people who have purchased his stuff that they are first rate in quality and have good customer service.... while buyig them is a way to go I encourage everyone to utilize their own skills... and perhaps if you are attempting a full scale conversion you would want to sharpen personal ones... otherwise the conversion would be so expensive it would never pay off
 
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Where do you mount the motor compared to the stock position? We mounted ours in the same position using the Dodge crossmember.The motor currently sits too high :o and needs lowered.It looks like I may fab up a different mount.This project needs finished so it can be wheeled soon.
 
Cam - didn't mean to be all 007 on Ya" , ha,ha . I am gathering parts before I dive head first into this up-grade so I have been searching instead of posting about stuff.
The 6BT will be going in the Blazer in my signature.

I started out using a in-line six cylinder 292 because of how well they pull at idle but I will find another home for that engine since I have the abillty to run a Cummins and have more bottom end grunt than I can stand.
It will be a while but I will post up pic's of the build up as I go .
Thanks for the help !
Tom
 
yes.. the dodge crossmember does make it too high.. as you found out...if you dont lower it in the frame...
Ive heard of people using the dog crossmember and modifying it to fit but most conversions Ive seen a new one was fabbed up... the issue being front pumpkin clearance...
I intend on using a bodylift for this reason, so I can get it higher in the frame, and for the 4 inch exhaust which goes down the passenger side, where its a tight fit between the body and the 205
Im not sure what you are really asking "its too high"..and "stock position" I understand you are saying that you didnt get it to fit right and need to do it again.... I know this sounds stupid but didnt you check everything during mockup and SEE that it was too high? PM me with your email and Ill send you the pdf dimensional picture,, you might find it helpful




ALSO IF ANYONE WANTS THE DIMENSIONAL CUMMINS PDF...please IM me if you can ... when you send a message thru my email it gets caught by my spamm filter and then I have to go thru many messges to get yours,,PITA

cam
 
The problem was we did it with the cab off.:o We were cleaning and
re-painting the frame at the time and figured it would be easy to just mount it then.Well lack of experience got us in trouble.
 
Twins T

Stoney,
Are we doing twins on the CrewCab?
Well when going twins turbos best have block/head o-ringed and a cooper headgasket and remove the head bolts and install studs.The bolts won't hold and the head will lift from the block.

CrewCab59
 
We got a new crossmember made today and it looks like it's going to work great. I'm trying to find someone to trade my GM nv4500 for a Dodge nv4500 so we can get this thing mounted in the correct position. We're also going to have to figure exhaust out.What are you guys running? My brother wants 4" on it but I think it will need a 3" downpipe right.
 
IIRC, you only have to change the bellhousing, not the whole tranny. Do 4" straight through, no muffler. use a 3"-4" adapter at the hot housing.
 
It's the 93'/94' GM version with the different bolt pattern.Another question I have is will we have to change the plate that's on the back of the CTD since it had an auto behind it from the factory?
 
suppose it'd be called the flywheel houseing. No, I don't think so.

I'm pretty sure they made the autos, nv4500 nv5600 and Getrag, all the same bolt pattern for the cummins.
 
Housing plate

67K10,
The housing that bolts to the block(starter bolts to and then the trans bolts up) is the same on auto and manual.

Also the first gen Chevy(Pre-1996) NV4500 has a different bolt spacing,and the input can't be changed for a dodge.The NV 4500 1996 and up are the same Chevy and Dodge.

CrewCab59
 
dont mean to hi-jack this thread but how 3208 cats? are there adapters to couple them to anything GM? Or would it be a big waste of time.
They seem to be plentifull and cheap around here.
 
the reason I ask is that a budy has a school bus that is being set up for a camper/tow rig.
 
It would be gravy in that application, as long as its a turbocharged version. size up the SAE flywheel houseing and match it too the appropriate Allison 545 automatic. :waytogo:

They're cheap and plentiful cause no one wants them anymore. They can run like ass. Sensitive to overheating, can crack the heads easliy. Old shop I worked at, we overhauled a 3208 for an independant graveltruck operator. Came back in the next week with "problems" Tooks the heads off, 7 of the 8 exhaust valve seats were cracked. "Oh I never overheated it" he says.....riiiiight
 
hey a newbie here i have a 97 215 and nv4500 and early 205 to go in my 84 cc dually4x4 ,mechanically not to worry but i have not seen any info on the pre heator . i am thinking the early non computor trucks may have wiring and a timed relay? that may be pirated or coppied any thoughts? Also i have hydroboost but am considering using vaccum to get rid of the lines to clean up under the hood anythoughts there? Demon44 looks like you are a serious of roader,as am i i am currently building an all aluminum cj type vehicle using mog diffs and44s 12"coilovers etc i am in sylvan lake but have wheeled in the wiaparious area.iam taking the turbo propane small block out of my truck to put in the jeep and that is why the cummins is going in,that and the awesome power that can be easily gotten from the 12 valve and the difficulty finding propane. sorry if i am i ranting on THX Dana
 
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