Our little LD9...stroked?!?

[jayhawk]

Thats right! Check this site out! Bump up the Hp to 190 at the flywheel!

http://www.dragevolution2200.com/Evolution_Store_Cavalier_Engine_Parts2.html


Jay

[martopg]

Holy shit that rocks! Too bad i don't have a spare $1500+ laying around :(

[Alero1]

Yeah, but with 11.0:1 compression, don't plan on doing anything else to it (s/c, turbo, n2o, etc) and using premium gas.

[garunner]

There's an artical in the May issue of Hot Rod of a pontiac sunfire with a 2.3 H.O. built up with 625hp and 500 lbs. torque...WOW

[Yeahdoug]

Originally posted by Alero1
Yeah, but with 11.0:1 compression, don't plan on doing anything else to it (s/c, turbo, n2o, etc) and using premium gas.

You can run nitrious on a high cr motor. Specially with aftermarket pistons/rods.

[p8ntman442]

Originally posted by garunner
There's an artical in the May issue of Hot Rod of a pontiac sunfire with a 2.3 H.O. built up with 625hp and 500 lbs. torque...WOW

Yeah and its all bs. Thats Dom from Grd, the rip off artist, that car does not produce those numbers, not that it cant be donw, cause it can, but not by him, hes to busy ripping people off to get any timeslips or dyno sheets forged to "prove" it either. Ask around about this. Its not just my opinion.

[Phantomus]

That's the sme stroker kit I was planning on putting into my car. I mention it in my other thread "What tranny do I have" in the modifications discussion. I will be putting that kit into a spare 2.4 that I have and I'll see of the results are true. Now I just need about another $1000 dollars.

:)

[Phantomus]

They also made mention that you could choose the compressin ratio on that kit. Why not opt for 10 to 1 so you can use your other power adders?

:)

[Alero1]

Originally posted by Phantomus
They also made mention that you could choose the compressin ratio on that kit. Why not opt for 10 to 1 so you can use your other power adders?

:)

Yes you could, but as soon as you start dropping the compressions ratio it isn't going to be making that 190hp anymore. The 11:1 CR is what is getting it up there.

[Phantomus]

How much horespower do honestly beleive you would drop just by dropping one point in compression? Couln't be be more than a few ponies. One point was never worth that much in other engines I built unless there was also a cam swap that required higher compression, unless you go to a better cam in the LD9. Some previous quad 4 based engines have had higher compression and more horespower, but also had better cams and higher flowing heads and intake designs. A few horsepower in your compression for an NA engine is a bad sacrifice, but if you do it so you can run you supercharger or turbocharger, the benifits outweigh the drawbacks.

[AbsolutGA]

So wait, if i were to put this stroker into my 2000 GA, i would never be able to use a supercharger in the future?

[Phantomus]

You would be able to use a supercharger if your compression is no higher than 10:1. If you use the pistons that the kit provides, you'll probably end up with a lot of detonation. If you use lower compression pistons with the same stroker kit, it won't make 190 HP by itself, but more along the lines of about 175 or 180 HP. With a supercharger you would reap the benifits of forced induction while taking advantage of the added torque throughout the power band of the stroker kit.

:)

[AbsolutGA]

is there a kit that is a little cheaper but does the exact thing, but doesnt come with the rods so that i can buy them seperately, or maybe a way i can do it piece by piece myself?

[Phantomus]

I haven't found another stroker kit for the LD9 yet, but I'm stil searching. As for putting a kit together like this yourself, all you would need is the crank and a lot of good measurments. A method I used to used to make simple strokers out of V8's is called "Offset Grinding". This is a machining process in which you reduce the rod journal diameter, but you grind off center to produce a little bit of extra stroke. This works great on ford 5.0's. Usually you have to find rods with a smaller journal diameter to use, but I have heard of "welding up" the crank so you can use the stock size journals. In this case however, I question the integrity of welding material on to your crank.

[AbsolutGA]

ok, but do you have any idea on how much i would end up spending on this process by doing it myself, and about how hard do you think it would be, and how long of a process? thanks!

[AbsolutGA]

ok, so wait a min, would i be able to purchase this kit, do the upgrade to the 11:1 compression ratio, and if or when i get a supercharger kit then lower the compression ratio, or would that mess up the engine?

[AmIGrand]

Whoa - and that's just from the stroker kit - ou could go .020" over, too - 2.7 liters! :D

One has to wonder if some serious cam adjustment is necessary with that kit, though - among other things.... :???: