So i recently bought a car and have been itching to know what it runs so here it goes.It's an 1989 camaro Iroc with a 350 TPI thats is 30 over bore and slightly higher compression.It has 2.02 intake and 1.6 exhaust valves,The intake has been ported and port matched.It has a hydralic roller cam that has .480 lift on the intake and exhaust thats all I know the guy I bought it from doesn't know the duration,new springs and lifters,25lb injectors,a BBk throttle body,Throttle response excellator,performance chip,some suspension work,Kumho tires and a flowmaster cat back.

So far I've Gutted out the airbox put in some k&n's and put on a new distribitor cap and rotor and wires,and a 160 degree thermostat I know it's kinda long but any replies will be much appreciated

 

with traction i'd say a mid 13. but that will be your limiting factor. i'm gonna say realistically a low 14 to high 13.

 

thanks and I forgot it has a shift kit and b&m megashifter though I doubt it will make much difference

 

Accually I noticed a big difference with the shift kit, the shifter would also help. that engine sounds like a solid 13.3-13.7 car, depending on how you drive and altitude.

 

shifter doesn't do crap. my car went 13.2 with my stock shifter.

 

you dont need to mess with manually shifting if you got your tran's governer and TV set up right to shift at what is most optimal for your combo. Put it in drive and let it do its work.

 

Is the "performance chip" an off the shelf chip?

 

Do you have an aftermarket shifter?

 

i have the b&m megashifter. it SUCKS! i took it out and put my stock one back in. the megashifter would stretch the cables like no bodys business. i went through three of their nice "heavy duty" cables. screw that man. the stock one works fine. just have to have a little more finess. now, to fix the problem of overshifting, i may try out b&m's new gate for the stock shifter. it's like $35 or so from jegs.

 

What is the part # for that gate? That would be nice. I like the appearance of the stock shifter but any help in preventing an accidental 1-3 shift would be great!

 

jegs p/n 130-81071

 

Well, there is no description on the Jegs site and I can't find it on the B&M site. Do you have any links?

I assume that I can find something for a th350?

 

http://www.bmracing.com/index.php?id...bcat=4&pid=305

 

Again...I'll repeat, Dial in your Slushboxes and you dont need to be concerned with the whole manual shifting problem. That is the whole perk to having an AUTOMATIC transmission. Just get a manual if wanna bang through the gears yourself.

 

well the reason I got the new shifter is because the stock one was cracked lacked a gear indicator and the **** looked like a dog had gotten a hold of it.Not sure if the performance chip is off the shelf or custom since the guy I bought it from didn't tell me.And as far as traction goes would a new set of tires like Goodyear eagle F1's or BFG KDW's,subframe connectors,and rear lower cotrol arms be enough

 

yeah, that's why manual valve bodies are so popular, right?

 

so are spoilers and whistle tips.... your point?

 

The Hurst Dual/Gate looks like a nice shifter. Btw, my runs are fast when I just put it in D and hit the gas.

 

also if I were to get gears what should i get like 3.73's?

 

Any Answers?

 

If you plan on keeping your TPI then no, go for 3.27's. If you change the induction to say a stealth ram or a lt1 intake then heck yea go for 3.73's. You need to be alittle more specific about your cam specs though. right now the TPI is not very good for much above 5000 rpms. which sucks for 3.73's.

 

I don't know any more about the cam the guy I bought it from doesn't know either because he didn't do the work

 

Well, The information stated about the stock TPI still holds. The motor will choke and fall on its face after 5000 rpm. those long tube runners are great for low end torque but not good for high end hp. 3.73 gears will move up the your rpms closer to 5000 rpms and beyond so it could be counter productive in the 1/4 mile. you can use 3.73 or 4.10 no problem if you change the manifold to a more optimal design for the higher power band. The camshaft though is the most critical component in tailoring your power band for your car. Without knowlege of its specs, Its hard to predict what the engine is capable of.

 

3.27's? what gears does a 89' iroc have stock?

 

anywhere from 2.7x to 3.4x. Most likely the smaller gears. 3.73s are was too much for TPI. 3.27-3.42s work really well.

 

after doin the 2.77 to 3.27 swap, i must say that 3.27's are bout perfect for a strong tpi. too much gear will put the car in rpms that are too much for TPI and thus actually slow u down. TPI uses torque to pull the car to run those ET's.. it does better with taller gears to keep the rpms in the 3000-4000rpm range.

with ur car and mild cam, as long as its tuned right, it should go mid 13's easy with decent traction and a converter.