rotorsownyou7

I have a vid, will be up later if I can find a host. Vid sucks but you can tell what goes on. Mods in sig. It was a Z28 Camaro with an exhaust and we went from a 20 roll. I ended up pulling him a couple of times by a couple of lengths to 110, then we went from 40 and I pulled about 3 or 4 to 115. He asked why I didn't keep going because I guess he thought he was going to pull on me top end

Then I layed down 226 whp hp on the dyno

https://www.rx7club.com/time-slips-dyno-121/what-hell-418849/

ProjectD

iTrader: (15)

Nice kill, but those dyno #s seem way too low

R281

Cool kill. Stupid work computer wont let me see vid.
Those HP numbers do seem kind of low considering you beat an LS1.

i own a car!!

what year was the z28? kuz the newer ones have 300hp eze stock

AbadR1

iTrader: (1)

Ls1 is got to be a 1998 and up. It should push 305 stock to the crank. They bump up the hp on newer models, but not by much at all maybe 310.

Considering your hp and his. Seems to be correct... I mean they do weigh a ton or a couple, hehe. Anyway, good kill...

Plus, a stock 7 should beat a stock Z28. Exhaust for the Z28 does not do much for performance more for the sound.

2FAST7S

Your #s are way too low! theyre closer to stock hp number...
On the dyno, the first pull will most likely be the higher #s cause the engine heats up and thus the intake air temps rise...higher air temps = less hp...Yours, however are the most dramatic i've ever seen. Did you do the pulls back to back???? Let it sit with the fans running for a few minutes next time! and find/fix the problem before you rid your rotary of apex seals!

rotorsownyou7

It did sit between pulls, and there isn't any problems from what I can tell. The car pulls like a 300 whp car on the street, but it did not show on the dyno.

I3oostedCubes

A stock FD will not beat a stock LS1 period w/ both having competent drivers.

R281

I don't want to start a flame war here and I like Rx7's way more than any LS1 powered cars, but aren't LS1's faster stock for stock?

usmcjsy

iTrader: (1)

Yes if both drivers are competent. However it would still be close if the drivers were about equal and both cars are BONE stock. Still I like to here of a LS1 getting taken by a rotary

03EBZ06

The LS1 F-Bodys are dyno'ing anywhere between 285 rwhp to 320 rwhp, I've seen many dyno sheets when I was LS1 engine moderator and as owner of an LS1 SS....so no, it is pushing lot more than 305 bhp.

What is stock 7's et? I know LS1 is in anywhere in 13 second range, depending on the driver, some very low 13's to high 13's. Also,, as for exhaust, it all depends on what type of exhaust you are talking about. Catback exhaust does help, but true dual exhaust helps quite a bit.

Outkast

1 word:

'03'04Cobra

LOL

Stock 3rd gen RX7s, as long as they are manual 5 speed dyno around 220 rwhp, and run 4.9 sec 0-60mph, and 13.5 @ 100 mph in the 1/4 mile. I understand that many SS/Z28 Camaros run better than this stock, they ROCK. Also, many crappy RX7s and crappyRX7 drivers are not able to achieve the above numbers. Therefor, they suck.

AbadR1

iTrader: (1)

he LS1 F-Bodys are dyno'ing anywhere between 285 rwhp to 320 rwhp, I've seen many dyno sheets when I was LS1 engine moderator and as owner of an LS1 SS....so no, it is pushing lot more than 305 bhp.

What is stock 7's et? I know LS1 is in anywhere in 13 second range, depending on the driver, some very low 13's to high 13's. Also,, as for exhaust, it all depends on what type of exhaust you are talking about. Catback exhaust does help, but true dual exhaust helps quite a bit.

285 and 320 rwhp seems to be kind of high for a stock z28, which I was referring to (305-310). Now the newer model 02 SS camaro could possibly dyno 285 range, since there stated crank hp is 325. I just cannot imagine a stated hp of 305 and 310 could push the norm 300rwhp range. That is incredible and I do not doubt you, since I myself do not own an LS1 F-body. But if those guys on the LS1 forum have a legit dyno sheet with a base Z28 pushing 285-320rwhp than I say awesome. I guess that is why my LS1 FD is going to be ready in a couple of weeks.

Now from what I have heard and from my past experience a catback on most muscle cars, doesnt add much hp, maybe like 5 to 10 hp. I use to own a '97 Cobra and going x-pipe and catback didnt do much for performance. It did make it sound mean, but still slow as a turtle. I heard if you go full exhaust, meaning LT headers all the way to catback with no cats, with a cold air intake and getting tuned would absolutely add mucho rwhp, even more with upgraded cams and heads. Which I will have in my car.

Anyway, not doubting anything you say. But seems kind of crazy that stock Z28 makes that kind of rwhp, I guess all those stated crank hp is for insurance purpose huh : )

AbadR1

iTrader: (1)

Outkast,
Three words, "Shelby Cobra GT500." 5.4 forged internals supercharger. Now the horsepower in the Cobra is going to be under rated!

usmcjsy

iTrader: (1)

Man all these #s for the LS1s are way more impressive then anything I have seen at my local dragstrip. Even nicely modded LS1s seem to be running low 13s and high12s. The bone stock ones seem to be running high13s. Anyway maybe elevation or somthing has a part on such bad #s at my track. Anyway that all I have personally seen. Then again the drivers could just suck to. Then again I have heard of people runnin 11s and 12s on stock turbos. Its kinda hard to believe but Rotary Performance did say that it was possible on there website. Now when I said stock turbos thats what I meant that does not mean stock car. Anyway I have not personally seen those #s on a stock turbo either. So what ever I just think between a FD and LS1 Camaro in stock form in a drag race would be a good race. I dont know what the weight of the Camaro is or what its geariing is but I do know the FDs, and maybe with the weight and gear ratios the FD can afford to be behind in the HP #s a little and still make a good race.

03EBZ06

Yes, that is one reason.

Another reason was not to offend their flagship Corvette owners.

The LS1 F-Body was definitely under-rated. The above Z28 in the image dyno'ed 321 rwhp, which translates to 369 hp to the crank. Now that is on the high side of average LS1 F-Body's dyno numbers but there are many in the 315 - 320 rwhp range. And of course there are many in the 290 - 300 rwhp range, mostly due to being auto and getting ran very hard for long time.

rotorsownyou7

I think it is just a cat-back. Didn't help him too much though.

AbadR1

iTrader: (1)

Man, still cant imagine those incredible numbers. I hope this 2002 LS1 motor I am getting is in good shape. I hope with full exhaust, cold intake, heads, cam, and a little tuning time will put me a little over 400rwhp. Cant wait...

03EBZ06

With H/C and all the supporting mods, you should be looking at around 430 - 450 rwhp, depending on flow of heads and size of a cam.

usmcjsy

iTrader: (1)

What would I be looking at with my street ported motor and a T-78 does anyone know..?

turbogarrett

iTrader: (1)

You'd probably be looking at a high 300's/low 400's on pump gas and a rebuild within 10 k miles.

Outkast

Disregard the ignorant comment above. 400 rear wheel horsepower on 15 psi and pump gas is very common to achieve with a T78.

turbogarrett

iTrader: (1)

How is that an ignorant comment? I said high 300's/low 400's on pump gas and if you think big power does not decrease engine life, stop kidding yourself. I'm not a rotary hater, I just prefer my current setup.

usmcjsy

iTrader: (1)

Thanks for the answers guys, please lets not turn this into another flame war. Turbogarrett is happy with his set up and thats fine. I am just currently running a BNR stage 3 and it is suppose to be capable of 350rwhp. Now I know the word is "capable" so I was wondering if anyone would know with my current set up what my chances of that are? I do not have a dyno near by and have never dynoed it. I know the LS1 is a serious motor, I personally have never been beat by one. Then again in my neck of the woods the most common mods is a K&N airfilter and cat back exhaust LOL. With that said even the LS1 would turn to **** pretty quick if you double or triple the HP like a lot of the rotary guys are doing. I dont mind swapping motors I just like the rush of the race. I guess if I wanted reliablity I would stick with the Camrys and Accords. I have had a LT1 that took a crap before a 100k to so I figure the rotarys are about the same. I dont know what happend with my LT1 either the head cracked and broke the piston or the piston broke and busted the cooling jacket in the head. I dont know what exactly happend but when I tore the engine down thats what I found. Thats when I went from GM to imports. So far I have not been treated any worse by the little Mazda. Most of who and what is better is a matter of opinion and nothing more. So take care guys and if anyone has any idea on how close I am to 350rwhp I would appreciate it. That also why I was wondering if a T-78 would give me much more in HP or would it be enough that it would even be noticable or worth it.

Outkast

Rock on. You probably revved the LT1 too high or something. Rotaries are quite reliable if treated/maintained right even with severe abuse. You could be pushing as much as 350 rw, how does it feel? With a T78 you will have the 350 guaranteed even with a bad tune, and more high rpm torque, but all your low end will be goooone. I have a T78 with a street port and 4.30 gears, and my car is reliable and HAULS ***. Don't listen to haters and posers. LS1s kick *** but so do rotaries and your setup sounds very nice and T78s are even nicer. Sounds like you'll like it. Haha LS1, just today a Vette looked for pathetic exuses not to race my T78 on 13 psi in the daytime. Haha, this guy was lame. I am sideways at 80 mph on drag radials.