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Old 09-21-2004, 12:36 PM
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350 SBC for 84 Corvette

Howdy,

I am new to this forum. I have an 84 Corvette Crossfire Corvette and I am upgrading the top end of the motor. It currently has 54k miles on the clock. (Please don't beat me up about the crossfire intake system)

This is what I am thinking of and I could a opinion or two.
L79 non roller Cam 222/222 .447/.447 with 1.5 rockers 114 LSA
I plan on using 1.6s so my lift will be .477/.477 - I realize this is small by todays standards but I think it will work well.
(any recommendations on a better cam would be appreciated - non roller)
AFR 180 (68 cc chambers)
Hedman Elite Ceramic Coated Headers with Air tubes (on order - I will have them in 3 weeks)
Flowmaster 50's
XRam and 2 inch TBs (2 inch TBs will flow 670 cfm)
(The xram is a weiand single plane manifold with a custom top plate to hold both TBs)
I figure my cr should be about 9.7:1 (with 68 cc chambers) or so depending on the head gasket I use.

I also can do my own computer tuning.

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Old 09-21-2004, 01:13 PM
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If you are doing your own computer work and are going to put that sort of money into it you'd be miles ahead IMO to go with a multiport injection system.

You could look into GM's hotcams or Lingenfelter's TPI cams as they will be a bit more aggresive but within reasonable specs of what a TPI can handle without having to resort to a vaccum resevoir.

And while yes, the crossfire was for most parts a junker system there are a few over at corvetteforum.com that have taken their CFI's and made 13 second motors out of them. But like I said for the money you be better off to ditch it for a TPI or LT1/LT4 type induction. TPI's have more bottom-mid potential wheras the LT1 type setup (with the super short runners) have a mid-high RPM powerband.
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Old 09-21-2004, 02:31 PM
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I understand what you are saying but from what I have researched the conversion to TPI or something like it is quite extensive and expensive. For now I am committed to the crossfire type induction system (extremely ported stock manifold or XRam).

Please don't take offense to this but everyone ask's "Why?". The answer is because I can. If it really came down to it I would just put a carb on it (I can tweek the computer for that as well) and be done with it. But I am a diehard and it is nothing more than air and gas.
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Old 09-21-2004, 03:13 PM
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Would involve changing some wiring . . . replacing your tank fuel pump with a higher pressure unit . . actually bolting the intake and runners on . . . changing the computer. You will be doing all this besides the fuel pump with what you have planned anyways.

However if you are so committed to keeping the Crossfire then I would do as I said in the first post and take a look at Corvetteforum.com. There aren't as many performance parts for this system out there (the induction system itself was only produced for a couple years) but you might get some ideas from them.
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