Good question. How's 13.8 at 102mph with no ****ing idea what my base timing was set at, a 2.26 60' and spinning like crazy in 2nd gear (stock stall TC), oh yeah, and with a stock timing table from the cop car which doesn't bring in timing fast enough = bogging until 3500rpm, go figure. Since then I haven't been to the track to race. Hey, while you're comparing my TBI setup try coming up with a thirdgen with my motor and a carb, then ask them what they're running. How about finding some TPI guy to use the vortec base and run any runners/plenum they want, let's see that.
I'm still waiting for another thirdgen with the 330ho motor to get into the 13's be it carb, TBI, or TPI!!!
BTW, here is a guy that's got the same power (should be making more than 330) and he's only got 1 more mph with the same ET not to mention his mods list is much bigger than mine.
https://www.thirdgen.org/rides/index...ew&rideid=3721
Do a search and please PLEASE get back to me. Until then, be ready for some mid to low 13 runs on the 13th.
That's when the **** hits the fan and people start figuring out that they can put this and that on their car but until you tune it you're gonna just keep wasting money and being slower than expected.

 

hey jprevost my buddy has the 330 hp motor in his 87 iroc. He got the complete motor with the carb already on it. With that and some slicks his best time so far is 13.3. He is still spinning some off the line, with the stock five speed still in the car (witch has busted twice) I think that is a very good time.
I plan on putting this motor in my car. I just have not made up my mind to carb or 670 TBI.

 

Im running my **** on the 13th, too. Albeit with stock gears, no posi, stock chip, and stock tbi. Woohoo high 14s here I come.

 

Am I going to have to go back east for you to get me running right? Hehehe!
Still have to do the rear end gears and I think I am running on 7 cylinders....
Wish you were out this way!
Ya ever gonna make a trip to the west coast Jon?
If you do, please visit!

 

sorry jon, i dont know anybody with the 330 horse crate in a thirdgen. good luck with the tuning and the run. believe it or not im ready for you to get the time you deserve. post that low 13 sec timeslip the tuning statement is right on, and that goes for EVERY induction system; my carbed car would run like **** if it was way out of tune also.

 

http://www.eecis.udel.edu/~davis/z28.../zz4_slip1.jpg

It says he ran that time (he's car #211) when the ZZ4 was 500 miles old and it used the complete stock TPI with some PROM tuning and a 870 ecm. Yeah, his engine is rated 25 hp higher than yours but he was using the stock manifold which I'm sure you're not. I don't know the guy but he obviously knows how to get a lot out of his set-up. He later on gets an 11.9 1/4 mile time with a different cam and heads (LT4 and AFR 190) and a modded long tube runner set up. That was with a 1.5x 60' time. And a dyno run said it only made 300 rear wheel horsepower when it ran that number. Like I said, he knows how to get a lot out of his set-up.

I really don't want to start another argument about TBI vs TPI here and that's not what the link to the above is trying to instigate. You asked for something and I gave it to you. You can make all the excuses you want and I can counter all the ones you make with excuses of my own but the bottom line is that you haven't run the number and you haven't proven TBI is just as good and so much cheaper. These are the arguments I keep hearing: just as good, cheaper, easier to service. You know what, I agree with you guys *IF* what we are talking about is keeping things stock and unmolested. But, once you start modding, all the arguments go out the window. Yes, a four barrel TBI can supply enough fuel for more than 360 HP but that's not stock and it requires a dedicated aftermarket ecm *UNLESS* you want to run some kind of kludge with the factory ecm. So there, TBI can make 400+ HP but not the factory units and don't expect it to be cheap. The stock TPI will not support 400+ HP either but the stock ecm can with changes so what you need to do is change the manifold and injectors, which guess what?, is a lot cheaper than buying the aftermarket ecm by itself. In the end, they both make similar HP numbers and end up costing the same and neither is even close to what the factory pieces are so what's the point in arguing. Let's be honest for a second and say that most of the cars on this board (on this site for that matter) are slow. High 13's is not fast. Most guys like to pick on ricers because *most* of them aren't fast, too. But what about the ones that are? The ones that are running 10's. Can you beat them? We both know they are far away from stock but they are running the numbers when everyone else says they can't. When you go out and run the numbers you expect, then what? What have you proven? Now, if someone asks, "can I ran low 13's with the stock TBI?", are you going to say "yeah, it was easy"? Do you really think that will change peoples minds? Do you really think that no one is going to be faster than you with the mods you have? What will it matter if someone does? When you say something like "when the **** hits the fan", what's that supposed to mean? Low 13's prove something? I think you are an intelligent guy and have lots of bright ideas but I think you also have a little too much pride. Pride can make you tough but pride can also keep you down. FWIW, I hope you get the numbers you want and prove everyone wrong. I have more to gain from someone's success. I have nothing to gain from anyone else's failure, other than trying to not repeat it myself.

 

Hectorsn, it's funny to see a guy pay for the zz4 motor and run what I'm running with $3000. $2000 was the long block and the extra $1000 was for a stewarts waterpump, vortec intake, holley 670cfm TB, prom burning equipment including laptop, and misc parts like $15 air cleaner etc. So like I said, TPI might be a better stock setup no doubt but anything away from stock and it's the bottle neck. I believe that the stock TBI intake with a $50 carb intake manifold and $10 adaptor plate are NOT the restrictions until you're reaching the 300hp mark where the cfm of the stock TB become a bottle neck. TBI was the forgotten EFI because people saw it on all of GM's low output motors, trucks, and never on a sports car long block! It's the same reason why anything that says "corvette motor" seems to turn heads. I figure TPI was the same way.
About the whole 400hp TPI ecm will support it but the TBI ecm's won't is false. Just because nobody on this board has spent the time on a TBI setup and kept the GM_ecm doesn't mean it isn't possible. They are very similar and when I get the chance to do a roller cam swap you can bet I'll be shooting for over 420hp and keeping the 670cfm holley unit. BTW, the holley TB is pretty much stock, it's a 454 GM TBI base so that makes it no different just more of a "reproduction" piece .
Again, show me a guy that's running MY motor like jordonz28ss and you'll have something to compare my car against. 13.3 sounds about right with slicks. I've got the mph for a low 13 with slicks but I was running stock width brand new (no grip) z rated tires. I still weight too much with all my stereo stuff and sound deadening. Doesn't help that I've got lowering springs and huge sway bars along with a STB and Globalwest wonderbar, lol. I'm going to just put slicks on for a couple of runs on the 13th and then I'm going to go with street tires because I'm looking for a 2.0_ 60' with stock tread and no LCA relocation brackets (along with stock torque arm and still using steel driveshaft). Since last I've removed my A/C (wasn't working) and installed a ~2600 stall TC. Should be a lot of fun to see how low I can go.

 

i am getting a little sick of having to lock posts because people wanna start teh tpi vs tbi vs carb ***** waving. i don't care what induction you have or like, if the content does not lend itself to tbi tech then it doesn't need to be here.
if anyone wants to bench race go to teh street racing and theoretical board, or better yet, figure out who has the same motor with carb and tpi and get everyone together for a shoot out to see who's really fastest.

later
tim