theshow72

Before I get beat up for asking this, I just want to say that I realize the 928 is not a drag car.
That being said, what can be done to shave time off of the 0-60 time? I'm not looking to smoke my tires or anything like that, I just want it to be quicker off the line. I have a 1982 4.5 automatic that I have not modified in any way yet. Short of a supercharger, is there any way to increase the intake? Bigger throttle body, etc? If so, who makes what that will fit my car without a lot (or any) fabrication on my part? Tire sizes? What else? Any suggestions?

w3lfd

As far as I can tell from looking into it myself, swapping to a 4 speed auto will give you what you are looking for. I have an 82 auto as well and i feel your pain . I susepect that any "tweaking" that can be done to the motor short of super charging it is going to let you down.

pcar928fan

The best way to do this is to get rid of the OB and get an S4 or an '85/'86 S at least... There is NO easy way to make it go even as quickly as an Accord Hybrid. Well, the 5spd models actually do pretty well, but the 3 spd autos...not so much...

ckabee1

From what I have read, there are a lot of OB owners who get good results with a 'Y' pipe, dropping the cats, and getting a better muffler. Roger at 928srus is a good source for the Y. I think Borla makes the muffler.

Or, you could shave some weight. Use the search for the "master weight saving thread" or something like that. Lots of good tips.

HTH

pcar928fan

The amount of work required to put a 4spd auto in that car would be INSANE! At least when you go from a 5spd OB car to an S4 auto you have to actually cut the floor pan away quite a bit to make it fit. I am not sure if the other 4spd autos are as large at the 90 model 4spd, but I bet they are and I am also not sure how the 82 floor pan differs from that of an '84 and up car...

There is NO EASY WAY, so the best thing to do is REALLY, REALLY fix up your '82 and make it as nice as possible so you can get MAX bucks for it and then put that into an early 5spd car or even better and 85/86 S 5spd car...

LightStriker

What is 4.5 automatic?

Well, it's not a drag car, but 4.5l still does 6.7-7.0 sec for a 0-60.
Which is REAL good for a almost 30 years old car.

To raise acceleration you can tweak the 2 side of the math :
1) Lower your weight.
2) Raise your HP.

From my weak memory, if I remember well, removing 10kg off your car mean 1 more hp.

For the #2, you have many way to raise your hp.
1) Better Y-pipe
2) Removing rear muffle (noisy)
3) Engine maintenance done (oil, filter, timing belt)
4) Clean air filter
5) Clean injector working properly with a perfectly balance mixture.
6) Probably many other thing from people here

If you get more cash :

Turbocompressor :
- Pro : none stress on the crank shaft
- Con : No boost at little rpm

Supercharger :
- Pro : Boost all the time
- Con : belt work and stress on engine

Electric Turbo :
- Pro : none
- Con : Clug your intake, no boost, ugly noise, risk of break that would destroy your engine

w3lfd

I don't know about insane, judging from other posts on the forums dealing with the subject as long as you have the equipment (torque tube, tranny, etc) it is not THAT big of a deal. Not to say that it's like changing the oil. Obviously there would be work involved.

Fixing and selling is a good idea, but when talking about an 82, you are talking pretty low numbers right now.

So really, anything that is going to get you what you want is going to cost a good bit, so it's worth considering all of the options.

LightStriker

... what?

Isn't the stock Accord doing 0-60 in 7.4?

theshow72

4.5 Automatic = 4.5L with automatic transmission. Sorry that wasn't clear.

I read about the Y pipe all the time in different posts. So that with a better muffler should make a difference? With low restriction Cat, I bet.

I'd love a supercharger. Someday!!

Thanks,
Joe

theshow72

How about headers like the ones 928 Motorsports sells? Any benefit to adding those and a Y pipe?

Lizard928

accept the car for what it is and get a better base, or work with the low CR and go to standalone EFI with lots of boost.

pcar928fan

Well, if in fact the 4spd auto will not fit where the 3 spd currently is you are going to have the completely strip the interior out of the car over the tans tunnel so you can first CUT OUT the parts that rub and THEN you will have to weld in new parts... So, maybe your idea of an insane thing to do with a street car and mine are different. We did it in my already completely stripped out race car and that was a big enough PITA, I can't imagine having to pull most of the interior to do that job and then have to put it all back in...

YMMV!

Oh, I don't know how fast an accord is, but I know that most new cars today seem to do 0-60 in less than 7 sec and realistically that is about the best you can expect from an old '82 auto 928...

LightStriker

I need to find back where it was listed in the workshop book, but I remember it says something like that the 3speed 4.5l was doing 6.7sec on 0-60 while the manual was 7.0sec.
However, it was listing top speed of the manual being higher than the auto.

My father has a 1.8l manual Matrix, and it doesn't do 0-60 in less than 7.0 sec.

Sure if you compare it to today's sport car... It's something else.

The stats of the old 928 is still impressive, even for today's standard. Not many 30 years old car can do that kind of stuff with minimal maintenance.

928nut

6.7 sec. - I can only wish.

8.5 sec. is ALL you'll get with a 4.5 liter - 3spd. auto, US model., 7.5 sec. for 5spd. manual. ('78- '82)

My initial test runs with my '79 automatic, with the "Y" pipe, minus air pump and all A/C crap removed, yielded 8.3 sec.

Not much of a gain from the "Y" pipe on the low end. It seems to have more pull above 60 mph but I do not get over 80 very often in my daily driving - too expensive ;-)

928nut

w3lfd

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