how can you guys be running 15 flat with a stockport 12a without traction? No LSD on those cars...

I got even more mods than all those mentioned and I'm sure I'm on high 15s haven't tested it at the track but man it sure will not hit 15 flat.

 

You don't need an LSD to have traction.

My car wasn't a stockport but it didn't make all that much power, less power then a well set up stockport should do. I never dynoed the car but it only takes 130hp for a 2400lb car/driver to have a 90mph trap speed. Remember though this is REAL hoserpower, not "30hp from the exhaust + 10hp from the fuel system + 15hp from the air filter + 25hp from the stickers" type numbers yanked out of one's nether regions

Key to traction is decent tires and a stock clutch. By decent tires I mean tires that grab harder when heated, and no Z-rated short sidewall BS - you want a tall tire on the stock 13" rims and you want the sidewall to be nice and flexible. I used 185/70 Goodyear Clubs set to 50psi front, 20psi rear when at the track. The tires hook and the clutch slips down.

http://www.geocities.com/izzmus/about.html for the full skinny, some timeslips, and a video clip.

 

Look at this, ive gone crosseyed

 

i still ran 14.6 without lsd on a gs...i had m/t street tires, they worked pretty good for me

 

14.6? Impressive? What level of other mods were on the car?

 

all i had done was a holy 600, r/b exhuast, i did have a mild exhaust port, holy red fuel pump

 

again ported and we are talking about 12a...guys be realistic.


I got everything done so far but porting...no bull.

 

you can still get a lot out of a 12a...dont doubt the power of a 12a...if you know what you are doing and have the car tuned right you can run pretty good times...i have seen 12a's run mid 14's a lot without porting, its nothing impossible

 

jrios I don't doubt the power of a 12a but I find it hard to believe that without porting a 12a will hit 14s and have a regular size driver with all his clothes on driving the car Unless the car is seriously stripped and with good traction there is no way that a 150hp engine will push it to mid 14s. It becomes more of the weight factor than that of power.

Granted I haven't tested my car yet and I have yet to loose to anybody without a very built n/a engine including hondas... Last night I tested my car againts a light light ZC CRX with header, intake and mild cams...and I spanked him by a car lenght...I also tested my rx against a 1995 stock 170hp B16 Vtec JDM (right hand drive) civic hatchback and was dead even I having a slight edge. My car runs good but I don't think I'm in flat 15s, or I'm I, comparing it with those cars? I come from 13s or lower cars and I'm just again getting into 12a for the fun factor ....maybe it does run flat 15s but I just won't know until I take to a track.

Now this thread is very informative because I wanted to port from the begining and not even try to do all the mods I have made so far. But the fun is building a quick NON-ported engine first, I am impressed with performance of the 12a in stock port form, I'm a believer. But the porting will be done...nitrous will be done and turbo too...the whole point is to have fun

 

i know this guy around that has an '83 gs with a 140,000 miles with weber (dont know what size) and some exhaust and constantly runs 15.1...thats not bad for a 12a with that high of mileage...take your car to the track and find out the time, sounds like a good running car

 

how much more hp will a yaw tuned nikki give you over stock?

 

For real? You bought ari's stars and stripes FD? i was just taking pictures of that thing the other day...

 

mperformance:

1.you keep mentioning power:wieght but you also have to keep in mind the transmission and gearing..rx7s have wonderful gearing with plunging redlines that give us the edge...i know i ran the shiit out of my 85..to 10k rpm frequently

2.you havent taken your car to the track..do you just feel your time???

not trying to be an a$$ but your arguments arent very thought out

 

So I take it you had a peripheral port engine with carbon seals etc. to warrant that kind of abuse?

 

no just a worn out motor i didnt care about....that damn overrev buzzer di d get annoying though

 

I'm with mperformance on this one. I can see 14's with no interior and drag slicks, but not with the setups we are talking about here. This whole thing started with a guy wanting to know what 150hp would get him with no big streetability compromise, and that's not 14's.

No, *YOUR* arguments aren't very though out! What do you think the point is of revving a stockport motor to 10k is?

I'll tell you what the point is: abso-*******-lutely nothing. Not to mention that the u-shaped intake manifolds on the weber/dell carbs are too restrictive for this even with porting.

Reving to 10k isn't going to make a stockport faster through the 1/4, that should be blatantly obvious.

BTW, as REVHED said, there's no way you're going to be reving your motor to 10k all the time without massive problems. Are you aware of the things that happen when a stock motor is brought above 8.5k? Click the search button and learn about it. How do you know you were hitting 10k? I find your statement very questionable.

Bullshit, mperformance is being way more objective and realistic here.

 

RXcetera : facon de parler!

 

Wankel: I know, I know... Silver and me are just kidding around .

Lots of bold statements in this thread. One guy says he's seen "alot" of stockport 12A (RX-7's I assume) run mid 14's. **** I would kill to see those... I bet sometimes I cant even do that in my 3rd gen. Another guy says he revs his stock motor to 10K rpm LOL! This I HAVE to see (as long as I'm not sitting in the car with him as he does it).

 

I think I would wear my ballistic blanket for that ride.....make a great set of pants

 

I have seen a lot of stock ported 12a's with upgraded fuel system, carb (holy or weber), and exhaust run mid 14's...I have seen a lot of guys in Puerto Rico run this time...its all about tuning and knowing what you're doing...just putting bolt on parts will not get you anywhere

 

I'm a human dyno/gtechpro I can "feel" acceleration/speed variations to the .10 scale. That's what I get from working on cars all my life....








BTW silverocket ....we finally agree on something...thanks

j/k

 

Guess the air is different in Puerto Rico, cause guys sure arent doing those kinds of times around here.

 

Maybe it's not in the air, but somewhere in the measuring tape.

 

make sure you are comparing apples with apples ... do Puerto Rican 12a's have the same sized ports as US cars ... European cars don't

 

the whole thread is about NON-ported 12a and how to get 150hp.

the subject comes up plenty of times in this forum. Like said the magic number is 150hp, I am sold on this theory which I did not come up with just what I have read here and elsewhere and I think is dead on accurate.
mid 14s with a non ported 12a n/a in a first gen (FA or FB) is not easy to achieve <---summarizing what is been described here, that includes any STOCK port being japanese, european, US, etc blocks.


My formula 150hp (I think )if anybody cares:

engine:
45DCOE weber lake city intake
Carter 7 psi fuel pump
Holley FPR
Yaw advanced timing
Magnecore 10mm ignition cables/stock coils
header/ 2.5" no presilencer/dynomax superturbo muffler
electric fan
no pwr steering

non-horsepower acceleration/reliability/drivability improvers...
weight redux(no rear anything, including bins)
Peejay's cable engine brace
rear drums
no a/c (finally decided to get rid of it)
old style oil cooler
fuel and a/f meter gauges
dual alt pulley
stock clutch disc
modified pressure plate
215/50/13s all around

still NOwhere in low 15s (too many cars running flat 15s that can beat mine and I ain't a bad driver)...much less 14s, come porting should be well on low 14s with a large streetport