Noelracer928

Hello everyone. I have been looking at getting more HP's out of my 84 and for a long time, so I thought of installing the stroker kit. Last week I talk to a guy who had a pearl with 79 that had a stroker motor and her said that supercharging was a more reliable way to go. Well I came across some money and my car is finally in better mechanical shape. So I would like some advice before I go blowing $5000.00 down the drain. <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

bcdavis

I would think that a stroker would be MUCH more reliable. With a supercharger, if the air-fuel mixture is incorrect, you can kill your engine.

The only downside with the stroker, is the cost of rebuilding the whole engine... But once it's in there, it's done, and pretty much just like stock...Very little can go "wrong" with a stroker.

The supercharger is more of a bolt-on.

Another benefit of the stroker, is being able to pass smog inspections in CA, and other states with visual inspections...

But with the cost of the rebuild, and the crank, it is almost twice the cost of a supercharger...

It seems like you will get more power from the supercharger too...

Noelracer928

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by bcdavis:
<strong>I would think that a stroker would be MUCH more reliable. With a supercharger, if the air-fuel mixture is incorrect, you can kill your engine.

The only downside with the stroker, is the cost of rebuilding the whole engine... But once it's in there, it's done, and pretty much just like stock...Very little can go "wrong" with a stroker.

The supercharger is more of a bolt-on.

Another benefit of the stroker, is being able to pass smog inspections in CA, and other states with visual inspections...

But with the cost of the rebuild, and the crank, it is almost twice the cost of a supercharger...

It seems like you will get more power from the supercharger too...</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Thanks for the info. If I did the stroker kit I would more than likely do the rebuild myself.

BC

I think that while there ARE higher stresses in SCing compared to a stroker, there are trad offs on both.

If you run an aftermarket ECU with a supercharger, then you can finitely control those AF ratios, and NOT have a problem.

That same thing can be said for a stroker. If anything, a stroker (no matter who does it, or what parts you use) is a compromise because the computers and sensors are not designed for that size engine.

If anything, the best of both worlds would be a bored and NOT stroked 928 with some good boost. That kind of 928 would walk away from all but a twin turbo Viper.

The next weak link would then be the transmission.

Ell

I do not think that you could build an engine for 5K. The crank cost 3K, the gasket set still cost around 500. Then you still have to get pistons and rods. Then of course once you have the engine apart you would want to do the general maintaince such as a timing belt job another 300.

Ed Ruiz

My mechanic has the short-block that came out of my GT. He says he can build a nice 5.4L from it for about $4,000. (Installation or shipping not included.) YMMV.

Blown Beast

If the car is going to be used as a street car I would say go with a S/C...the $ vs HP is by far the lowest and easy to bolt on. If you plan on doing a lot of track time Id do the stroker set up..but plan on spending a lot more$!!!!Just my .02

PeteS

Don't automatically assume that you can't have any reliability problems with a stroker. There have been stroker motors in 928s that have blown up too. An improper air/fuel ratio will kill an engine whether is supercharged, turbocharged, nitrous injected, or normally aspirated.

As was mentioned in a previous thread, if you're going to run a stroker engine at the same RPM as the stock engine, that's going to mean higher average piston speeds. That means more and faster wear, and also a greater chance of stuff coming apart at high RPM.

Even if you're doing the rebuild yourself, if you've got $5K and want to do a stroker motor, I think you'll need to save up money for a while yet.

PeteS

Ooops. Double post somehow.

Zandramus

How about a supercharged stroker?

bcdavis

Well, the ideal power-monster would be a stroker, with low compression pistons. With a strong bottom end, so you can run massive boost... All the books I have read on Supercharging, nitrous, turbos, etc, recommend forged cranks, rods, and low-compression pistons, like 8.5/1. Then boost the heck out of it...

If you really want a giant-killer, it is ideal to do an engine rebuild prior to tossing on the supercharger. A lot of the failures so far, such as the issues with the Huntley car, were due to bolting the SC on a car with a problem engine...

Some of the most successful SC cars out there, did rebuilds from the ground up...

Brent 89-GT

I think you need to consider how much power you want, and how you will use the car. Your first BIG issue is that you have a 2 valve car. Most of the strokers and SC'ed cars that I know of are 32V. That said, there is no reason you can't do the same to a 16V.

I don't think that there is a proven 16V supercharger kit out there yet. The 32V kits are in a couple of stages, the low pressure FAST kit that gets you about 400hp on a 32V car and Tim Murphys new kit that comes close to 500hp on a 32V car. I personally wouldn't run a SC'ed car on the track. This is no more than my opinion, so it could be way off but, I just don't think stock internals can take pressure on top of standard racetrack rigors.

The stroker would be a better track engine IMO. While you are rebuilding you can go with forged pistons which will hold up better if racing. You are also back to having a new engine as mentioned.

So what are you looking at? 400-450hp 6.4L stroker for nearly $10k. 400hp low pressure SC kit for $5-6k. Or a 500hp intercooled high pressure SC for about $8-9k. If all else fails the supercharged and stroked "Tilo" car is still for sale

I would do some more research as to what EXACTLY can be done with your 16V car, and for how much. Good Luck

TAREK

Do BOTH. Stroker first, and include the cost of forged pistons + bore for supercharging later

Noelracer928

I'm mainly looking for a a top speed of 170-180MPH, and a 0 to 60 in the 5.0 - 6.2 range. I really don't want to sell my car because I've done alot of work on it and have become very attached to it. Plus it has a unique look to it. Selling it fo an S4 would take alot of convincing. Would it be easier getting the euro heads and cams and swaping them with mine?

Rich9928p

I wouldn't consider supercharging an engine unless the lower-end was refurbished, rod bearings as a minimum. All of that extra HP has to get out, and sometimes the pistons don't stop at the bottom of the stroke ... they keep go'n out the bottom of the engine! This cost needs to be added to a supercharge budget.