Stroke it? Blow it?

[dizzymac]

I think you should "Stroke" it. I think that HP/Torque gain is not worth the money you'll shellout to "blow" it, and more thing to go wrong.

 

[XJRocket]

blow it. I am working on a low cost supercharger kit. And by low I am aiming for under a grand. I will give you more details as I go.

P.S. Not tryin to pimp my un-made stuff here just tryin to inform!

 

[streetpirate]

*DROOOL*

http://portland.craigslist.org/pts/133380111.html

thats what an xj needs!

 

[Neil]

*DROOOL*

http://portland.craigslist.org/pts/133380111.html

thats what an xj needs!

Maybe for Jeep Speed Racing. But for the kind of wheeling that I do they would be pretty useless. They would definitely help getting me plenty of tickets on the way to the trail. I do mostly rock crawling so I am looking at a stroker, more torque and HP at lower RPM's than turbos and superchargers. I used to run a twin turbo setup on an SCCCA car that I used to race. Some tracks they worked great. Other tracks were too short and they didn't have time to spool up before the next turn. They were a lot of fun though, like a shot of nitrous that never ran out. I am looking to put a turbo on my Lexus, but that's after I get my junk set up.

Neil

 

[streetpirate]

ive got a 72 plymouth scamp that im building into a SCCA car. v8 is cheaper but damn would a turbo six cylinder be cooler!

 

[Neil]

ive got a 72 plymouth scamp that im building into a SCCA car. v8 is cheaper but damn would a turbo six cylinder be cooler!

I used to NHRA drag race a 74 Dodge Dart with a tri-power 340 with all sorts of trick goodies ran low 12's. That was a lot of fun, with no turbos or superchargers.

 

[jeeperjohn]

Personally, given the choice, I would go with a Kenne Bell supercharger. This is given that I have a solid motor that is not in need of rebuild. If the motor needs a rebuild anyway, the obvious choice is the stroker. The supercharger is significantly more expensive initially, but so is the stroker if you do it right to take full advantage of the mod. With the KB (Kenne Bell) you only have to buy the kit. With a stroker you will be doing alot of expensive machine work and replacing a bunch of parts. The throttle body will have to be upgraded, the fuel injectors will need to be changed, fuel pressure regulator, and perhaps a better fuel pump. Also the head should be ported to allow for better airflow. The exhaust system will then need to be replaced to allow for the increased flow. Now you might say those things will have to be done with the KB also but these changes are not necessary to get an increase in power with the KB. The stroker will not make significantly more power without these mods. As for longevity, I feel that if the supercharger is properly installed and serviced properly, and if you are not constantly running at full throttle, the longevity will only be reduced slightly over stroking the engine. So to summarize; if you have a healthy engine already and a little more cash, supercharge. If your engine is at all in need of a rebuild, stroke it.

 

[Neil]

So to summarize; if you have a healthy engine already and a little more cash, supercharge. If your engine is at all in need of a rebuild, stroke it.

I don't think that it's quite that simple. You also have to consider the type of driving you are going to do. A supercharger really doesn't work well for rock crawling. However, a stroker produces more torque at a lower rpm. For mud bogging a supercharger would would work great because you can take full advantage of the supercharger. There are also mods that you would have to do for supercharging, larger injectors, higher fuel pressure... ect. Generally similar fuel delivery and flow increase modifications for stroking. What I'm trying to say is there is no one size fits all answer to this question. Any way you do it, it's going to cost you.

Neil

 

[jeeperjohn]

I agree but would like to point out that the KB makes full pressure from just over 1000 rpm. This is in contrast to roots type superchargers and centrifugal superchargers, which produce boost on a curve. Driving habits are important as well.

 

[Gil BullyKatz]

Stroke it AND throw a Kenne Bell on top of it!

Excess IS best!