CFI,

Nice try. I was responding to your post of being about 1/2 sec slower than my car. YOUR car will be slower yet once I get done with mine.
My mph last time out was 102.1. That's with the fuel cutoff activating thru the traps.

qws,

The cam is a custom grind from CompCams based on the flow numbers for the TFS heads and calc'd by Motors and Machines. Its a single pattern with 54d overlap and 108d LSA.

 

Mark,

Don't be disuaded from having a 84. There are quite a few variations of them floating around. Dom has done really impressive things with his(13.3 @ 102), Ben73 in the land down under presently has the fastest with a quarter mile time of 12.4 @ 111ish. He has a 383 with XRam in his. I am presently running a 383/XRam as well and my best in the quarter is 12.95 @ 106ish. There are some with the XRam or extrude honed like Dom's and even a conversion using a 454 TB with a Holley Projection manifold - and it fits under the hood. Granted it is more of a challenge but results can be had.

 

Do your own thing with your '84. It's your car, go for it. I bought my '84 specifically for the Z51 suspension, then tossed out the stock engine for a 355 turbo, fed by a 454 TB. It runs great, and I've shut up a lot of cocky bas**rds with more expensive rides. Any fool can write a check for a fast car. It takes talent to put a car together that runs strong and is different from the pack.

 

I misunderstood. So your modifications are going to make YOUR car slower, they are going to make MY car slower??? How does THAT work?


About 4 MPH faster. What does that figure out to, $1000.00 per MPH? What is the point of a fuel cutoff? My car doesn't have one. At least not one I've experienced shifting at 6000 rpms and above.




Then there is my oil burner that can only muster up a 13.80 quarter mile on the all original (except for the home ported intake manifold), 23 year old, engine.

RACE ON!!!

 

Having a CROSS FIRE INJECTION fender molding is like putting the old 307 side marker on a 396. Sleeper material.

 

Thanks for the info and encouragement guys. I too like the sleeper quality of these cars.

What sort of issues would I run into If I went the 454tb & Holly Projection manifold route? I also own a 1990 454ss pickup that I converted to carb, and I have a 454 tb setting on a shelf! I know of at least a couple problems involving the throttle cables and detent cable. The 454 tb has no provision for any kind of detent or kickdown cable. I could probably make one??

Thanks
Mark

 

Mark,

Talk to Ronny about the Holley Projection unit. He has on on his 84.

 

Be sure to do your homework before you just cobble up a cable attachment for that TB. The 700R4 uses a TV (Throttle Valve) cable rather than a "detent or kickdown cable". The transmission is quite sensitive to the cable movement. the actuating lever needs to have the proper geometry because improper cable operation can ruin a transmission in a hurry.

RACE ON!!!

 

marksp, to answer your original question, I ran a 224/234@ .050' and .465"/.488" lift cam in my '83 Trans Am with zero issues. This was in a SBC 400, that cam, roller rockers, ported intake (yes, you can to port the bejesus of of the intake -to whoever ignorantly said that you can't!) bored TB's, removed "swirl plates" and crappy Edelbrock, shorty "headers", single stock '86 cat and 3" single exhaust. This was all on a bone stock, 7.8:1 compression, oil-burning, junk-yard 400 long block.

With that combo, I ran 13.25 @ 105, returned a solid and repeatable 24 mpg on the highway, and this was all on the stock and original ECM and chip. Not bad, IMO...and better than Dom's best times. I had ~$1500 into mine...and that included buying the long block! lol. CFI has plenty of potential, as long as you apply logic and KISS. The stock ECM can be "tricked" into doing...whatever you want, really.

For the bored TB's Turbo City sells them, but frankly you can do it yourself. I did mine on a boring machine (for motorcycle/snowmobile cylinders). Bought the throttle plates from Holley. A guy named Dan does it for a fee on the Crossfire forum, and he does great work, but it's not hard to do: Could do it on a lathe too.

Injectors can be gotten from GM (454 TBI) or any number of places. I got mine from "Dr. Injector", found it on ebay and got them there.

 

www.x-ram.com

 

The XRam is a much freer flowing manifold, but the runners are really short. It's great for something like a 355 that you wanna turn to 6500+, but for a more streetable, torquey motor you're actually better of just heavily porting the stock manifold. Some crossfire forum members have gone back to the ported stock manifold from the X-Ram because of the losses in low-end torque. For the money an X-Ram sells for it seems to be a better deal to port the old manifold and bore out the original TBs.

 

I'm still not convinced that the X-Ram flows any more air than my ported stocker.

RACE ON!!!

 

Some people haven't. I use it on mine (stock motor) but would by all means recommend the 1.6RR's to be used with it. I haven't noticed any lose in my low end torque. If anything it has improved. Not that the X-ram is the best thing to use but don't rule it out. YES it is cheaper to port your own manifold. To see what it will do go to my corvette pics there is a dyno. The day of the pull I was running to rich, if I lean it out a bit I should have some better results.