88IntegraLS

I finally got to a real drag strip and ran the quarter mile with my stock cat and cat back still on, and the car ended up running a 14.9 @ 95. 60' was 2.35 and the 1/8th was 9.74 @ 74.5 and the outside temp was 85 with low humidity.

Yay for street ports and weight reduction. But what a pos, the car wouldn't launch at all. Total wheelspin. All season 205 tires don't work too well. I'm guessing I could drop another second with a few more modz like an SAFC, highflow cat + catback, and slicks. Wouldn't that be kool.

casio

ive kept up with the n/a threads (though most turn shitty), and have seen you mention youve done weight reduction and said you weighed about 2600(?). what year and what have you removed and what do you and don't you have (sorry, i dont have the trim levels memorized)? for example, power steering, a/c, sunroof, steel/alum hood, etc.
thanks.

88IntegraLS

The car started out as an 87 base without a sunroof and I removed so much crap that the car now weighs about 2375 lbs ready to roll. Search the second gen section for "weighs 2420" to see the original thread I did with the list of parts removed / swapped. Add to that list an RB header (worth about 20 lbs. less than stock cat and precats) and airpump removal, worth about 5-8 lbs.

Weight reduction counts, and I still have nearly all of my visible interior pieces in the car. Another S4 GXL at the track that day ran a mid 17. It was old and stock, and probably had low compression.

casio

yea, i recently laid my rear carpet back in the car, but havent gotten to take the tar out yet. i'm not worried about (putting back in) the other small pieces of carpet, i just didnt like all that bare metal showing. my smog pump is out, with the rebuild the a/c and power steering will be gone (coincidentally neither work).
i have a 91 couple ("gxl"), so i have the sunroof. eventually i'd like to remove the sunroof and motor (etc) and only have a carbon fiber piece attached with Zeus clips (though that would be easy to break into if the person was these; hopefully nothing expensive will be in my car) in its place.
thanks, i'll search for that thread.

jacobcartmill

iTrader: (6)

wow those are good times man. my NA ran a 15.5@88 and i was happy

a 2.3 60 can be changed to a 2.0 or better with some drag radials so thats automatically atleast a 14.6 right there. then you have the exhaust and safc. i could see you running some consistent low 14's.
thats also a very good MPH. i say with 20 more hp and a sub-2.0 60ft, you're in the VERY low 14's

88IntegraLS

Thanks man. This car could be one of the rare NA's that get into the 13's, but I'll probably boost it before doing all possible NA mods. Weight reduction really counts, and I'm talking wheels / tires too. The car is running on 12lb. 91 coupe FC five star 15x6's. I'm surprised not very many people know how light these are. They are within a pound of the 11lb. BBS vert wheels, and rotating weight is worth a few tenths. So is redline MTL, intake manifold insulation, a real cold air intake with some ram pressure, advancing the ignition timing just the right amount, etc. etc. There are a lot of trix to the game of making an NA not slow.

dreamnshadow

what kind of street port? how aggressive is it? and are all the ports ported? i was thinking to only port the 5th and 6th to keep low end, what do u suggest? im trying for low 14's on my NA too.

casio

search that and youll see what he's done.

dreamnshadow

thanks.

dreamnshadow

after reading that i have a question, the bumper supports waht exactly? 25 pounds? i thought it was just the styrophome (spelling?) that was the supports? cause i took it out thinking that it was accidently put in there by last owner who had an accident. what does it looks like?

and also, i didnt find anything on the street port....

88IntegraLS

Search for "porting practice" and look at the last page to see the ports.

The bumper support is a huge chunk of fiberglass and steel. I don't recommend removing it if you commute in the city, where a moron in an SUV is likely to ruin your day.

casio

there is styrofoam in the bumper, though. i've seen it at junkyards that have the bumper sitting in front of them. yes, rx7s. many other cars, too.

dreamnshadow

is it bad if the styrofoam is removed? i didnt know its supposed to be there, thought it might cause fire or something else bad. should i put it bad on? i think the bumber supports are still there beside the foam.

casio

i've never tested ramming cars against one another with and without styrofoam in their bumpers, so i couldnt say. i bet that therapeudic foam would work in a similar way, heh. i really just dont know, though. seems our bumper is too low for most cars out there today anyways (given, i live in texas. trucks and suvs are abundants. oh, and diesels.).

ddub

I took out the styrofoam in my bumpers when I did the s5 bumper swap. Remember, there is still a very large and very strong bumper support behind the styrofoam, so you and your engine bay will be just as safe without the foam than with it. I think the foam is meant for slow collisions and keeping the bumper "less" dented and hurt... but oh well.

casio

i figured its one of those things (like that therapuedic stuff) thats weak and fragile, yet a blow to it it resists. i would think of it as an energy absorber (though i could be wrong). metal bars absorb energy a bit differently than something that gives.
you could be on to something with the low speed collision thing. i really dunno..

88IntegraLS

Ok, I made it out to another drag event and have bested my prior time. I got an SAFC and have been putting a rough tune on it, and it helped.

New time @ 89 degrees with a 29.6 barometer:


14.78 @ 95.5 with a 2.2 60'


I think the SAFC tuning has helped because the car gets out of the hole faster (midrange after launch is stronger) and pulls a bit more on top. The old time was on an 85 degree day with a higher barometric pressure, so it looks like the SAFC really is worth a couple hundred bux if u know how to set it up (I've been using my gtech).

Now to lose my stock cat and do some more intake porting.

jacobcartmill

iTrader: (6)

i read kevin (rarestrx)'s post about his safcII and it got him like 14rwhp. take that thing to the dyno, get some drag radials (also do as big of a burnout as possible), and run some more timing.
i think you can get to 97-98mph which is good for a high high 13 second pass with a good 60ft.

edit: LOSE THAT STOCK CAT! thats another couple rwhp right there!

safc = atleast 10whp
stock cat removal = maybe 5 rwhp

thats ATLEAST 15rwhp waiting to happen. get some 1.8 60ft's and you're in the 13's my man

88IntegraLS

Lol, yeah the stock cat is an irritation for me right now and I have a highflow one in the mail on the way. I'm also going to have a set of autocross (low profile) slicks on bbs vert wheels next time out, and that combination should hook up harder and be about 5-10 lbs. lighter than the street wheels / tires I've been using.

Some guy at the track called my car a sleeper because the 15" wheels make it look like a normal NA FC, and they run mid 17's when they ever show up at the track I go to.

There were a few V8 muscle machines and V6 M90 supercharged pontiacs in the low/mid 15's that night, lol. I was checking those M90's out y0, 10lbs of boost with low intake temps added to a low 14 FC NA would make it end up in the 12's.

BDoty311

Keep it up, just don't beat my 14.6 @ 97mph!

What are your average times, its seems when I used to drag my n/a, that my times would mostly be 14.7s and 14.8s. Launches would all feel about the same, but sometimes I got lucky and was able to squeeze out a 14.6.

And also are you getting any kind of wheel hop? You might look into checking out your suspension bushings and seeing if they are in decent shape. If they are all torn up, they will drive you insane.

88IntegraLS

My average time is about 14.9 right now because I was playing with settings on the SAFC and playing with timing. I'm not geting wheel hop at all but I'm also learning how to do a big burnout through all the rubber left in the waterbox and right after it, in order to pick up some of it. The car hooks up hard after I started doing this - so hard that I have to mash the gas while gently letting out the clutch @ 7k rpm. The one time anything other than a bog happened on launch, there was wheelspin for a split second.

I'm looking forward to the wheels / slicks though. 10lbs less per wheel is big. It should be worth a couple tenths and a mph or two. It's also going to be nice to run this winter when it's about 50-60 out. That should be worth a couple more tenths.

I don't think this car will hit 13's without some extreme work done to it as NA, but 14.1 and 14.2 could be reasonably possible. It's only got a fairly mild street port except for the larg aux ports.

mythe7

a guy i know was running high 13's in his 88 gtu. he was running 13.9@108. i think he couldve gotten faster with some good tires cause i dont think they were hooking up very well. hes also on his stock computer and stock exhaust manifold and he hasnt done the s4 to s5 im swap. so he's adding a hedder and probably gonna do im swap. he just added a sound system so i bet hes back to low 14's cause the system probably made up for all the weightreduction.