ws6

What type of Hp/Tq and MPH does an RX7 come out with, with bolt ons and a stock turbo? Also what is the max boost that a RX7's stock turbo(i.e. engine) can handle? Any RX7 between 93 and 96.

MrRx

iTrader: (1)

search, its your best friend

basic bolts on with no ecu 280ish, i wouldent go over 15psi with the stock twins.

Kevin T. Wyum

I'll cut to the chase for you. A stock (including tires) RX7 can run 13.3 in the 1/4. A stock block RX7 with bolt-ons and DOT tires can run a 10.98 @125mph in the 1/4 on a 1.62 60'. Is that really what you wanted to know?

ws6

13.3 at what mph, and what 60 foot. Stock the cars actually run low 13s? Also when I say bolt ons I mean stock turbo and motor, and then the rest of the bolt ons...ie-exhaust, intake, intercooler, misc stuff. Oh and on drag radials with a so-so driver. Thanks!

rotorhead333

Go buy Grand Turismo 4.... or do a search. There are many, many factors for your vague questions, literally hundreds of setups can give you thousands of outcomes.

ws6

I'm not looking for an exact hp number, just a ball park average number and around the 1/4mile speeds it would run, that's all. I tried a search but didn't find any real outcomes, maybe I'll try again.

books

iTrader: (8)

check the time slips and dyno section of this forum

and see this site also http://www.catenet.net/dyno.php

Kevin T. Wyum

Dont recall the MPH, very low 100's. 60' was in the 1.8's. The corrected 10.98 was with a stock motor, and modified stock turbos but did still have the OEM manifolds and housings etc. That was on M&H street legal DOT tires, not radials, but essentially the same thing. Saying it should be a so-so driver is a pretty silly thing to ask for. "I don't like that time, put a worse driver in for pete's sake."

adictd2b00st

why, are u doing research for an upcoming race or somthing?

fastcarfreak

From your name it looks like you own an WS6 transam. With a couple of bolt ons like, catback exhaust, midpipe, intake, and power fc fuel computer I toasted a cocky WS6 driver. Hell, I was even able to best a Firehawk with full exhaust and a good tire from a dig (dont know what else he had, but the race was close)

short answer is, bone stock rx7s make about 225 rwhp with a strong running motor. You can easily get a stock ported motor with stock turbo and all the boltons in the low 300s. If the motor is ported then mid 300s isnt uncommon. In very very very rare cases, with very very very good tuning it is possible to pull close to 400 rwhp with the stock twins, and a ported motor. Everything is in the tuning though.

ws6

Well yes, if you must know, it's for a possible upcoming race. I'm not that slow though. I putting down about 400 to the wheels, and I've got a good tire. I'm also not that bad a driver. Oh and I'm not cocky. I think that RX7s are actually good looking little cars. Granted they are rice! But, never the less I have respect for most all sports cars and muscle cars of all kinds.

I was just trying to get a ball park on what this other guy is running. I'd be safe to say he doesn't have motor work done, nor a bigger turbo/turbos. But he probably has all the bolt ons and a boost controller. I hear he is not that great a driver in the 1/4, i.e. launching.

Basically I'm just doing my homework that's all. I'd like a decently fare race. I don't under estamate cars that are boosted anymore. My buddy and his dad have a Buick Grand National, bigger turbo and things, and is probably in the 10s. So any impute is appriciated. Thanks.

Conv.WS6

Most stock RX7's I've seen at the track trap in around 100 flat. With the basic intake, downpipe, and exhaust they liven up quite a bit, and typically trap in around 104-107. From that point on, you can count the next stage as bolt ons, but they are expensive. PFC(ecu), intercooler, midpipe, larger injectors, and why not throw a fuel pump in. 2-3K worth.
That pretty much maxs the flow of a stock motor, and warrants a pretty nasty little ride like fastcarfreak has described. The one thing I will say though is that even though trap speeds seem to be pretty predictable, the ET's at the track for RX7's have a wider range than the typical v8 powered cars because of the skill needed to launch the car correctly and not blow the tires away or lag. The Ls1 is a pretty nasty power source though, and with the same mod money spent, most rx7's have some trouble especially as the hp race gets into the really high levels. What it really boils down too is how much money do you have, and what kind of image do you want. later guys.

Matt Hey

It should be a good drag race if the RX-7 is running good. Many have troubles with the stock turbo system as it's very complicated. He should be in the 12's with 110-115 mph trap unless he has a *lot* of bolt-ons or a lot of problems . Heat soak can be a problem at the strip though. You might beat him at the strip by 1/2 a sec and on the street from a roll he might return the favor. His HP is likely 280-350 to the rear wheels but he is light at about 2800 lbs.

I don't know how rice the RX-7 is? The Wankel engine was invented in Germany, tested in the U.S., and refined in Japan. That "good looking little car" body you speak of was designed here in the U.S. (University in California) by an American of Chinese ancestory. More than you wanted to know?

Kevin T. Wyum

Stock block without porting and modified stock turbos with most other bolt ons and reduced weight allows up to 125mph in the 1/4. That was my best MPH on the stock block. I'm a decent driver and you're right, driver skill will impact the ET dramatically. Most people aren't terribly good at launching the cars and most don't use good drag tires, they all want 19" spinners . I'm just giving you a range of what's possible. I beat 10 second cars in street races back when I used to and was running mid 11's, simply because the drivers weren't that good. Driver skill can make over a 1 second difference easily. Be safe in your race.

Kevin T. Wyum

matty

kevin ran a great time.
i would say the avg for a full bolton on car (stock engine stock turbo) is high 11s low 12s. Check out the time slip section.

ws6

Thanks for all the great info guys! I guess I stand mostly corrected on the "rice" term...mostly. Though I do think it would be a good race between the two of us, as far as quarter mile. From a roll...I think it would be close.

Funny thing is, he said he would even give me two on the move. OK, thats fine. If he's that confedent, he had better not use it as an excuse when you know what happens! I have a feeling he has ran a few stock LS1s with crappy drivers, so he thinks he knows. We'll see. Thanks again for all your help.

TEDDER1

iTrader: (1)

For more comparisons... I ran an 8.2 in the 1/8th with regular firehawk 225 tires that were severely bald. With an intake, downpipe, and exhaust. I had a buddy with a LT1 camaro with a vortech and the 10# pulley along with the typical bolt-ons. I ran just a wee bit faster than him on the street from either a dig or roll. He had 430-435RWHP.

You'd be surprised what the weight difference can produce. Generally I've noticed that several other cars, whether it be supras, camaros, mustangs, whatever... need AT LEAST >75hp to stay even with a lighter FD depending on their setup... Tires/slicks obviously make a huge difference, but all things similar ie: street setup.

And not trying to be smartass or sarcastic or anything really, but I have messed with quite a few LS1s... it wont be a ricemobile slaughter like you may think.

Got a picture of me racing an NSX and a SS Camaro at the same time. The NSX is 5 cars back and the camaro right behind him... as I changed into 5th..

TT_Rex_7

Here comes MATTY!! I still say you think the stock twins are the anti-christ!

-Alex

matty

hahah. i was nervous to post that as it seems the issue has finally quieted down.

I will be tuning my stock twin full bolt on car (on 17psi) in 11 days.
she made 340rwhp @ 1.00 boost (14.22psi) as measured by the power fc. It ran 116mph traps. This was with a kdr tune and an 11.2 afr. I now had a hks ignition and upgraded my clutch and flywheel. Steve kan will be tuning it to 17psi. Stay tuned. Perhaps i will eat my own words although my arguement was always based on 15psi.

ws6

Well guys, I figured I would give you an update on this whole thread. The RX7 and WS6 raced tonight. There was also another guy there with an 03 cobra. There where four races....I was in all of them. Both guys wanted to see what there cars would do against mine. We went out to a back road that few people go on. We were probably there at least and hour and a half. Well here goes........

1st race::: The RX7 and me. I got the jump off the line on him, but then spun a little. When I spun he got out a car on me. 1st and 2nd we were locked in 3rd I started pulling him pretty good. At the end of the 1/4 I was about a car and a half ahead. My win.

2nd race:::The Cobra and me. Granted this cobra had:pulley, full exhaust, full intake...probably just under 500whp. I jumped him off the line pretty good, and put about two cars on him. Needless to say he came back on me and at the finish his bumper was just ahead of mine. Barley loss.

3rd race:::The Cobra and me. This time I had a bad start. When the car at the end flashed the lights, I wasn't quiet ready...chase is a race! I held my own though and the cobra was about a car and a half ahead. My loss.

4th race:::The RX7 wanted more. This time it was bad for him. I got a big jump of the line and put a car on him. From then to the finish, I pulled him. I had about two and half cars on him. My win.


All in all, that RX7 ran good, he still had stock turbos he says. All bolt ons. He did say the car weighs only 26 hundred something. Thats light. Like about 900 pounds lighter than me. Is it just me, or do those rotary engines sound like a cross between an airplane and jet engine put together when they start up?

TEDDER1

iTrader: (1)

What do you have done?

ws6

Full bolt ons and a decent cam. Also have suspension mods and a good tire.

OneRotor

iTrader: (3)

sounds like you guys were on a backroad street racing. take your cars to a track and set up so you guys can race eachother. that should make it a really close race between you and the 7. as it stands with your WS6 and the 7's mods, there is no way that either of you will be able to hang with the cobra. read a magazine article about that damn thing right after it came out, they put on an x-pipe and some borla side-exit exhaust, and a CAI from a lightning, and the thing put 400 to the rear wheels. the internal code name for that engine was Terminator, and it shows. those are grossly under rated at 400fwhp from the factory.

you said that you got a jump on the 7 both times, at the track it'll show who is a better driver, because both of you *should* leave with a few hundredths of eachother.

ws6

Well whitey85, I know for a fact that he wouldn't beat me at the track. Because the first run we made, he got out on me in 1st, because I spun a little, and sure enough I came around him in my 3rd and 4th. So at the track I would have beat him.

As far as the cobra, those are some cool cars that's for sure. I believe that this guys car dynos somewhere around upper 400 rwhp. The only disadvantage is that he said that thing is a pig, 3800 pounds WITHOUT driver. That's heavy.

matty

i wonder what his exact mods were and what boost he is running. Its all about the boost level with rx-7's.