Tech_Greek

Supercharged RX-7 (Camden Supercharger)

Racing Beat Cat Back
FD Fuel Pump

That's the only true mods towards the supercharger...according to the guys around here and the people I've seen race a TII does around a 14.9-15.3 so I don't think I'm doing too bad, I've still got water injection, injectors, LSD, matched tires, etc to go.

Nicholas P.

iTrader: (1)

not to mention a transmission.

btw. time slip is all '3582'ed up

Tech_Greek

Looks fine to me, yeah needs new tranny defintley

ddub

Yah time slip is blurred to hell, you can make it out, though.

And yah a TII in completely bone stock forum, and healthy, will do around 14.9 to 15.2 on average with a competent driver.

Tech_Greek

Everyone's been telling me if I get the 60 foot time down it could be high 13's - low 14's easily..

ddub

I can't even make out the 60 foot since it's so blurred. 2.32 or something?

It's usually hard to get under 2.0's on 2nd gens without drag radials or some serious torque. Best I ever got was 2.0 and that was with a launching technique that tended to break things, very easily very fast.

Jrat has been able to get 1.8's or something on street tires, but he's insane.

Tech_Greek

Yeah, 2.232.

Well, remember, I have the instant torque that a lot of rotaries don't have as well!

There's a huge difference between riding in my car and a N/A/Turbo car.

I was thinking about getting drag radials but I've heard that the axles are very likely to break...

ddub

Ball bearing turbo setups have instant torque as well... They will build boost just as fast as your supercharger. Plus turbo guys can launch in an RPM where they are/will be in boost, so that really negates any "fast building boost."

My point had nothing to do with NA, Turbo, Supercharger, just 2 rotor rotaries in general. Hence why a 500rwhp 2 rotor still only has about 300 torque.

And yes don't get drag radials with n/a axles. Besides, I'm in the mind set of who the F cares what someone can do with drag radials? Doesn't mean much to me, do they drive around on drag radials daily on the street? Nope... so it's not what they are truly doing day in and day out. Same thing goes for the people that go to the dragstrip and fill up with the highest octane race gas they can, then up the boost a ton. Doesn't mean anything to me, but that's just my opinion.

Every time I ran at the strip I did it on the tires I ran on the street, the same psi for the tires, everything the same.

SonicRaT

iTrader: (6)

Jrat was two-stepping, so he had boost off launch as well.

Cosmo_TT

iTrader: (11)

i feel the same way i cant stand it when people drive to the track and when they get there pull out thier seats door panels and whatever else they can unbolt quickly then swap thier wheels for some different ones like lighter ones with slicks or radials then drive around town claiming "i run low 13's" but if they were to race the car how it is when they say that it would be high 13's or even low 14's

fcfanatic

Anything to claim a number. Kind of pathetic. Good #'s for your setup Tech Greek.

Tech_Greek

Well I mean eventually it'll get to the point where you kind of HAVE to get radials right? Traction will be an issue down the road?

I've been told many times in the past day that an LSD would make for much better launches as I did have to correct out the hole when it wants to turn sideways from the yabbadabbado one wheeler.

SonicRaT

iTrader: (6)

I drive to/from the track with nitto's on the car, and commonly drive around town with them as well. With the N/A lsd, stock suspension, and sticky tires, expect to replace your driveline VERY quickly. I've destroyed axles, diffs, mounts, and all sorts of peices with a stock turbo on the N/a driveline with an open diff and nittos.

Tech_Greek

I don't have an LSD, 90 GXL remember? I was thinking about either doing a N/A LSD or swapping the whole drive train over to TII stuff...

SonicRaT

iTrader: (6)

Yeah, i know. I was referring to when/if you go with an N/A lsd. Though, even with an open it's easy to break them. Might as well have got that TII if you're going to go through all the work of swappin the driveline, that **** sucks!

88rxn/a

iTrader: (6)

nice...i thought you gave up on this project...glad you didnt....im really nervous with a n/a drivetrain...im not really sure how long its going to last....i think ill switch to my stock tires that the car came with (bald) just so i can get them to spin..

SonicRaT

iTrader: (6)

I managed to pull off consistent mid 12s with the stock turbo in a setup similar to yours, with 60fts of roughly 2 flat on walmart tires with an open diff. Gotta love those turbo N/As! I would pump the throttle through 1st and 2nd gear just to try to get traction.... (I could also one wheel it with ease in 3rd gear at 55+ just by punching it)....I can still do it now with the LSD, but with probably twice the HP

88rxn/a

iTrader: (6)

very nice...although i think you had an 86 right??? kinda of a big weight difference compared to my GTU thats got electcric everything....how much boost?? wasnt it 14lbs or somthin...i think i got a boost leak cause it drops boost(drops to about 6 or 7 lbs.) at around 6K...im planning on the Aaron cake strawberry method since i think its either leaking at the N/A elbo to throttle body or right of the turbo...
were gonna try and tune it more when its nicer out soon and after i find that damn leak or whatever is causing the boost drop...

Dom_C

The stock turbo simply can't push enough air at high RPM's. Maybe it was recently rebuilt it would do a little better but they simply don't hold boost that well up high.

rotorforce

Pointless.. I think the formula is: for every 100lbs you gain a 10th of a second.

slpin

iTrader: (9)

high 13s with a 94mph trap?
everyone is a retard.

besides... at your current trap speed, you shouldnt be complaining about traction....

Tech_Greek

Um, yes I should because if when I hit second gear I slide for a second or off the line I slide all the way through first it's going to hurt ET's as far as I know...

And I started off at a 91 MPH trap, and it kept going up, remember this is my first time at the track ever so I'm still learning how to drive it...streets and strips are two totally different ball fields.

It was a 94.5 MPH trap, my friend bobby in his S2000 trapped a 96.0 and did a 14.0 flat.

SonicRaT

iTrader: (6)

You'll be needing to trap around 98-99 to click off under 14 with a decent launch. Unless you swap on some drag radials. Although, I wouldn't expect your ET to drop too far from where it's at without a little more modding. I would guess you could probably eek a 14.4-5 out of it with a decent launch getting your 60fts down to about 2.0-2.1.

Tech_Greek

I'm not wanting high 13's, that's a long way away from what I care to run right now, just going down tenth by tenth is good with me.

A big problem I had was heat soak at the track, as I had to drive at 85-100 MPH to get to the track the whole way by the time I got there, it was defintley heated up like an oven from having to boost to pass traffic (we got seperated from the pack fo cars we were with as we snagged a red light).

As you saw, each time I ran, startin with a 15.4, then a 15.3, then a 15.1, then a 15.0, then a 14.7 the ET's kept dropping each time but It started to rain, I think with Water Injection/Alc it would have been a little better to start off with.

How bad will wheel hop hurt me, I know the diff it's bad for sure, so polyurethane mounts and everything are going to be on the way when I get money for them, but will it hurt 60 foot times? I'm going to assume yes as the tires making intermentient contact putting power down wise.

SonicRaT

iTrader: (6)

As for your time it'll hurt it similarly to just spinning the tires, though i've noticed most of the time that you don't lose as much time wheel hopping (although, you will destroy something in short order doing it). But anyway, the superchargers area to shine at the track will be the 60ft and 330, but it looks likes due to the wheelspin you're not able to take advantage. This is why the 1/8th mile is so bad.