Anyone have a Raby rebuild yet?

[mts]

Originally Posted by Jake Raby

Mts,
The stage 1/ 3.6 engine based from a 3.2 nets about 250 RWHP, we hope to have that up to 265 with even more torque after this week as I am assembling one of them now. I have another one in line right behind this one.

What I shoot for on the full street engines is big torque and all very usable..

An engine like Phil's can be easily driven daily and would offer more power than anyone could ever imagine from a pump gas 3.2 base. I am building one now for my 996 using the same combo as Phil's..

Jake,

Is that 250whp on a Mustang dyno? My stock 3.2 makes 228whp on a dynojet (2004 anniversary edition). There seems like there should be a bigger difference for all the work/cost involved. Maybe its in the torque numbers? I realize comparisons dyno to dyno are hard, but what am I missing? For some reason I was thinking that 3.6/3.2 upgrade would produce closer to +50-60whp on the same dyno vs stock?

Thanks,
Mike

[Jake Raby]

Originally Posted by mts

Jake,

Is that 250whp on a Mustang dyno? My stock 3.2 makes 228whp on a dynojet (2004 anniversary edition). There seems like there should be a bigger difference for all the work/cost involved. Maybe its in the torque numbers? I realize comparisons dyno to dyno are hard, but what am I missing? For some reason I was thinking that 3.6/3.2 upgrade would produce closer to +50-60whp on the same dyno vs stock?

Thanks,
Mike

The next stage of the 3.2>3.6 makes 290 RWHP on my Dynojet...

The torque is the big difference on the stage 1, 3.6 engine as thats what a street car needs most. On the base engine we keep the heads stock and only bump[ the CR .5 point over stock. This engine does not need any aftermarket components to make the power I listed, not even an ECU flash.

We make more torque at a lower RPM and that enhances drive ability greatly. We also make the HP lower in the RPM range which is great if you like to DE or AX the car and don't want to drive it around at red line all the time and that makes for a longer life.

Attached is a dyno graph from a recently completed stage II 3.6 engine that started off life as a 3.2.. Here are the before and after differences that my program made for this Boxster S. Don't just look at the peak numbers, look at how fat that torque curve is and how broad the power is..

[edevlin]

Jake, I know your exhaust system analysis is in process, but I was wondering what exhaust you are using with, or recommending with your 3.2 > 3.6L conversions? The engine in my 2.7L is running fine now, but if it dies, I would love to be able to stuff one of your 3.6L conversions into it. But I dont know what I would need for the conversion besides the engine.

Stock base 2000 ECU?

Stock base 5-speed manual tranny?

Do most folks stick in a new clutch?

Intake?

New exhaust system?


Ed

[mts]

Jake,

Thanks for the info. The area under the curve on the torque piece is what I was missing. For the stage II, you've got a 70+ whp peak difference and a 50+ torque peak difference in addition to a much fuller area under the curve which is in the range (actually slightly higher) than what I was thinking.

Do you have a before/after on a stage I?

Thanks for all your efforts with this.

Mike