i have a recipe for my engine which i like my friend ses i wont notice the diffrence that much is he right? what would my 1/4 times be? and how much hp?

here it is - 350 bored to 355ci, trickflow G2 heads,9:8:1 compression,comp cams 218/228 @50,balanced 24LB injectors,52mm throttle body,1 5/8" headers and 3" exhaust,2000rpm tq converter.,3:27 stock gears,all stock tpi except ported plenum and bigger injectors and 52mm throttle body.

i allready have all the bolt ons underdirve pulleys,400hp fuel pump,AFPR,fan switch,low temp thermostat,ported plenum,home made air induction,corvette servo,B&m shift kit,high performance ignition,probably more cant remember.

im looking for high 12s is this realistic?

 

No! Not enough gear. try 3.42-3.73 . You will want more stall, like 2400-2600. Do the heads have any work to them? What is the lift of the cam and what rocker ratio are you going to run? Are your lower intake and runners stock? I have a supperram for sale. Upper and lower. Cheap! PM me if you are interested.

 

i dont want more gear because my lockup doesnt work.no the lower intake and runners are stock i dont know the lift of the cam.do you think i need more stall i dont think i want more than 2500. the heads are out of the box not modified.

 

i would say mid 13s AT MOST, a nice 150 Pill will get u into the 12s though

 

w/ a better intake setup i think it could see 12s... i have a buddy w/ zz4 shortblock, TFS twisted wedge heads(ported) 224/224 cam, miniram, slp 1 3/4 shorties throught a flowmaster catback hitting 11.84 in the 1/4... can't remember his mph though...

really its all in getting the combo right... that intake is ur weak link in that combo... switch that out and you just might get into the 12s..

 

well this setup was used in high performance mag and they got 12.0 in the 1/4 with a stealth ram intake maybe i should go for the stealth intake.

 

you only need 300 RWHP to run 12s in a 3rd gen, I think that should do the trick with a bigger stall. whoever said you'd only 13s, LAF@U, I was running 13s on street tires with a 3000 stall converter, headers, exhaust, and free mods on a bone stock IROC 350. ha you can't drive.

 

Laugh all you want, the stock TPI negates the heads and cam benefits. I'd give ya mid 13s at best too... It ain't gonna make 300rwhp with that...

I think the StealthRam sounds like an excellent idea for that setup.

 

well i think the stealth set up is better but i believe i would run high 12s with the tpi set up not mid 13s i appreciate evrybodys opinion.what about porting all the stock tpi stuff for now until i can get enough for the other intake maybe mid 12s right? oh yeah and ray i would have to dissagree with you about the 300 rwhp they got 330rwhp and 400 tq with the same setup and stealth but with the tpi it would probably be more like 290rwhp and 475tq so which is better?

 

That's what I'm saying, with the stock TPI stuff it is not going to make 300rwhp IMO, I don't even see 290... (maybe ported heavily...) I'm sure with a good intake that engine setup would, no doubt about that... But The GM High Tech car barely broke 13.0 with the long tube runner setup, and that was with aftermarket stuff and some pretty extensive porting. How is the stock unported TPI going to match that? No way will the stock, unported TPI support that motor into the 12s IMO, could be wrong... As for which is better, you can only use so much lowend torque, especially on the street, either setup will have plenty. If 1/4 ET is important the LTR setup isn't going to hold a candle, as the GM hightech tests proved as well... The StealthRam even 60-footed and ran the 1/8 mile better, which is the "lower end" you might have expected the LTR setup to be excelling at...

I wish you all the luck though, go for it, maybe you can squeeze your goal out of the stock TPI stuff, I hope so.

Oh yeah, don't forget you can likely sell off the TPI parts to fund most of the SR...

 

yes you are right i dont think the LTR isnt as good but i may have to go that way if the cash isnt their i hope i can get the SR but dont know if i can hopefully with the stock ported intake i can run with the new vettes and LS1 camaros i would be happy with that for now unless of course you have a better idea for me i allways open for new ideas.

 

The article is on the CHP Website...it wasn't a stock TPI, it was an Edlebrock base and SLP runners, believe it ran around 13.3 or so, the switch to the HSR, got them in the mid 12's with some tuning, IIRC, by Mike Davis.

I don't think the stock base and runners would keep up with the Edlebrock and SLP's.

Mid to high 13's would be a better estimate, based on the CHP article.

Back to bench racing....

 

well they where runningfully ported gm base and plenum and SLP runners and they ran 12.9-13.0 the only diffrence in mine would be the runners so it should be low 13s to mid 13s so you are right about going 12s but you are wrong about the article i think it would run 13.3-13.5 or so.

 

I guess you're correct, I re-read the article. It was a ported GM base and ran "12.9-13.0" in 88* weather.

The more the age, the less the memory.

 

well i had the material right in front of me but anyway do you think im right i prbably could get into the mid 13s right? im 35 so i know what you mean about the memory thing lol.

 

as crappy as TPI is you can easily make over 300 RWHP with on. But you won't be taking full advantage of your engines output.

 

Guys, you can run 11's naturally aspirated with a LTR TPI intake, it's been done! You just need a little more motor underneath that TPI to do it!

 

well then i guess all i need is a set of long tube runners and port the base and im in buisness low 13s here i come lol.

 

I thought that combination looked familiar

First, the intake was a fully ported GM base (not siamesed) that should flow as good or better than a mildly worked aftermarket base. The SLP runners were worked over with the divider removed to a little less than halfway down the runners. The plenum was hogged out and radiused. I would expect it to perform very similar to a midly worked Super Ram intake system. A relatively stock TPI system does great on stock heads, but a stock TPI will not allow you much benefit from better than stock heads – in a sense putting a cap on flow.

I would not suggest going with the twisted wedge heads,,, unless you never,,, EVER plan to go bigger than a 230/230 .520/.520 lift cam. Even then, depending on the lobe spread and the installed intake center line,,,, you still may have piston to valve clearance problems with regular flat top pistons,,, and forget about running a dome piston. The 195 Canfields are a good value and there are companies that offer full CNC porting that deliver impressive airflow from them. That’s something to consider later if you end up a true hot rodder,,, and when fast (box stock) is never fast enough. I’m not knocking the twisted wedge heads,,, they’re excellent heads, they’re just VERY limited in what you can do with them without buying TFS pistons,,, and there are other heads that are just as good (and better) that are not,,, or at least not as limiting.

I’d also suggest going with the Hedman long tube headers if emissions are not a problem. That’s “free” power and ground clearance is adequate for most standard height vehicles.

As far as times go,,, there are a ton of variables. I’ve “tuned” basically stock TPIs back when they were new. One with headers and a good “cat back” – no cat - stock heads, stock intake, stock runners, stock cam, stock torque converter, stock 3.23 gears,and a stock torque converter ran 13.20s (temps in the low 70s). This car would have easily run in the 12s in cooler weather with a “good” torque converter – but the car hooked like glue. The times you see in the magazine article on the IROC could have easily dropped from 13.0s to 12.7s with a good suspension and even lower with a nuts on tune in the chip (a stock 88 350 chip was used). But instead of investing in a suspension (at that time),, I chose to go with the StealthRam hoping (educated guess) that it would roll off just enough torque around the stall speed to allow the car to hook without “feathering” the throttle past the 60 ft mark – and it did – floor it and go! The StealthRam really needs more gear than the IROC is running (3.23s),, especially since it has a TH350 with a 2.53:1 first gear ratio – and you HAVE to put at least 2500 – 2600 worth of stall behind it or you’ll be much better off sticking with a long tube runner design.

I know this is long, but I hope it helps you (and others) in your parts selection.

Kevin

----

Bad91,,, if you’re implying you have enough motor to run in the 11s,,, do you have any time-slips to back it up? Depending on your race weight, outside temp,,, how hard you’re willing to ride the clutch,, blah, blah, blah,,, it could be possible. Mainly will be dependant on how much those “Stage III” Vortecs flow - did you have them flow tested?

 

Geez, I wish I was nearer to 35, than 45

Thing is, why spend all the money on heads, cam, etc, and not another 400-500 for an intake that is proven to put the combo in the 12's?

Since your bottleneck will be the runners, and there's not much, if anythnig you can do with them, at a minimum I'd get some that can be opened up to flow some air.

 

i think im gonna uae the combo they used in the mag including the staelth ram setup thats a 12 second setup thats all i need i here what your saying about going past that but thats just enough for me if i want more later i will go with 3:70 gears and my car should be better off the line because of the 700r4.

 

58mm TB , stock plenum/runners, stock internals, stock manifolds, 2000 stall, and i hit a 13.9 at 96 mph and that was with it being about 90f outside. I think that combo would be more than enough to hit mid 13's. Good luck.

 

wow thats awsome all stock man i guess what they say about tpi is not all true if what you are saying is true i should definitly hit low 13s thanks for the info man.

 

TPI is intended for a 305, but you can do 12s w/a 350 in it no problem...

 

im definitly going with the stealth ram setup i think thats the way to go.

 

Last time I ran my z it ran a 13.91@98 mph. At the time I had a gutted air box,air foil, 1.5 rollers, edelbrock headers,2500 stall, full manual 700R4 with other mods, stock 3.23 gears, 3'' flowie setup with no cats. Mind you the tires were !@#ing bald! I had to peddle it past the 60' mark until it hooked! Not bad for a STOCK engine.

 

This guy is basically laughing at himself...I think you should read up a bit more before you start talking like that.

 

why would I magazine race? I prefer to do the real thing. just cause you are slow and/or can't drive doesn't mean a good driver can't get 13s out of a stock motored IROC. sorry, 13s only out of a heads and cam car. gimme a break...

 

well i think this setup will get into the low 12s as long as i use the stealth ram with it. what are you guys talking about magazine racing?