Usually with Vortech kit for a 5.0, they have a 3.33" pulley which is a 10# pulley. Thats also with no powerpipe, Im pushin 11psi on a stock bottom end in my 02 4.6 with alky inj as a cooler. The bottom end on the 5.0s were stronger then the 4.6s. On a mild bolt on 95 GT with a blower and only 9psi he will be puttin down a little over 300rwhp with a custom tune. The car isn't as heavy as you think either it should be 3300#s.
Now I believe you said he also has a 3.73gear and a E303 cam, he will beat you unless he cant drive or hook, he clearly has a faster car with more power. A bolt on 5.0 with a gear and a nicely tuned E303 cam will out run a mild bolt on LT1, LT4 and even the LS1. I know this from xperiance...

If I knew all his mods I could probably tell ya how much power he has and damn near what he runs. You need to find out if hes really runnin 9#s a 3.33 pulley is a 10# pulley and with a powerpipe (the pipe that bends from the blower to the filter) he would be runnin 10-12psi. I know this cause my buddy 5.0 did it. Also like I said with the cam bolt on and gear he going to take ya hard.

 

That is horrible for that GT, they should blow it up

My stock 02GT with a stock auto dynoed 348rwhp with a SQ trim at 8psi. On a vortech tune, 5spds usually will dyno like 370rwhp with an SQ trim. Just dyno tunning what I had I made 370 rwhp. A 3.46 pulley and powerpipe I dynoed 393rwhp and with a few minor bolt-ons and alky inj. I dynoed 409rwhp (also a better tune)... BTW thats all still on a stock auto trans, now with a better fuel system and built trans I will be over 425rwhp and were are not even going to go into what I will make with the spray also. Right now on a stock bottomend I spray a 30 shot very very rarely.

 

Darren the only thing restricting LT1's, along w/HP per cube etc is the aftermarket is to the contrary, shrinking vice growing. See, fox body mustangs, for instance, have only seen an increase in availability of parts etc and the LS1's should see the same, as it is indeed the now preferred, and stock (quicker), GM smallblock. Even companies such as SLP have strayed from them, and it will likely continue to get harder to find the variety of parts that are not custom fabbed to get the performance desired by some, IMO.

I am LT1 faithful, but it isn't by any means the only vehicle I like, so I hope as to not assume that of me, not the case. I like the '03-'04 Cobras, but they are expensive for a tuner car for me. Also would prefer not to have IRS, as I've experienced enough problems & tunability w/your standard 10 & 12-bolts to keep things interesting enough for me. As for if/when I'll buy and LS1? Probably after I get my '95 running 11's NA the way I want with reliable parts (I'm aways down the road for that still).

Joe - the guy wasn't at work today, so I can't speak on what pulley he is running, only I recall on several occasions him stating he is holding 9lbs of boost, so I'd ASSUME it's a 3.33. Either way, cam, bolt ons, gears & blower. We will both be on street tires, 1/8 mile track. I am probably a more experienced driver than him, but anything can happen. For all I know, he may show up w/stickies and dead-hook w/12lbs and an X303, although the cam sounds fairly mild but not stock. Thanks.

 

I was thinking mostly of the cost of decent heads for these cars. The LT1 guys I usually talk to are always saying how much cheaper the heads/cam packages are on LT1's vs LS1's. I know for the setup I would want (afr 205 heads & TR224 cam) it would cost me between 3-4K when it was all said and done. That's a steep figure for a lot of guys still making big car payments. But the aftermarket for LS1's are big and car payments won't last forever.

I'm surprised to hear that actually. By reading your sig and a few of your LS1 comments I was sure you were LT1 4 life. I guess I stand corrected.

Good luck getting your car to 11's NA. But when you get there remember this..............

You can spray your way right into the 10's

 

Small world really, I am putting AFR 195cc LT4 heads on the '95, along with (the small for this setup) LT4HC, Intake, 58mmTB & 30lb. SVO injectors. I'm hoping for 11.9x's with this NA through the current street twin, 12bolt w/4.11's and stock style suspension, full weight. We'll see, but it's a steep order.

 

Good luck, Do your best to get him outta the hole since its only an 1/8 mile track, cause with his mods he does have the power on ya.

 

Okay, yet another update (this is getting grim for me, lol...)

He came into work today, and it is running better, but he's having some issues w/idle quality right now, he's trying to work the gremlins out before the weekend. We'll see...

He did correct my assumption that he was running stock heads. They are not (figures ) It has '94 Cobra heads on it w/roller rockers, didn't ask which ratio, just figure that he is likely, on a good day, laying down anywhere from 325-360rwhp. Don't know exactly, but learned yet something else:

The blower is not a Vortech, it is a Powerdyne. Yes, a powerdyne, so maybe this will work out in my favor. Any 5.0 guys out there have or had similar combos or seen these run? I know according to him, he pulled on an '02 GT w/twin screw Kenne Bell, but didn't know/give any specs on the rest of the car.

He's got me thinking maybe I should bring DR's just in case I need a big jump outta the hole.

 

Hes putting down more then you think then, an 02 with a twin screw will put down aleast 360-370rwhp...

 

Hey I figured I would give you some information that might help. Here in Houston TX I had two friends that had similar combinations.

1 : 1993 cobra all stock except 3.73:1 gear and 9 psi Powerdyne his E.T. fluctuated between 13.0 to 12.6 speed stayed 108 mph.

2: 1993 Mustang LX GT-40 iron heads (cobra heads), Cobra intake, intake,E-cam,LTs, H-pipe,flowmaster cat back, 3.55:1 gears, Vortech A trim 12 psi. His car ran 12.20 to 12.00 at 110 to 113 mph.

Not exact science but food for thought.

 

Thanks for the info. I should have probably told him I'd run him in the Z, lol...

That's okay, I can take a whoopin' if it comes down to that, but hopefully I will get out on him, and trap before he catches up...

I think he will have traction issues worse than I. I'm sure the car is putting down pretty good numbers, but much like a high horsepower Supra, if you can't put it down, it isn't doing you much good. He don't have DR's or slicks, so it should be a driver's race.

Thanks again.

 

If you have drag radials use them. That track sucks for traction on street tires......I have a set of MT ET Streets with rims I could sell you for the right price if you want to put the smack down on him. Let me know.
Rob

 

LS1 was and is in a far uglier body syle. LT4 in a 97, pre-bulbous Formula Firehawk = ultimate 4th gen F-Body...period...sorry (actually, not sorry)...

 

Its definantly a ton better than the ZL1.
IMHO, say what you will about the Camaro, pre 98 vs. 98+, I would agree there. But, the 98+ Firebird & T/A front looks soooo much meaner than the 93 ~ 97.

 

Thats a matter of opinion. I owned a '97 WS6 T/A for a year but traded it for a 2000 because the LS1's look bada**!! And because of the LS1 engine also.

 

Like I posted earlier I went 11.3@118+ with a similar combo back in 1996!!