allegretto

out of the 981S engine... reliably?

Thanks in advance

Z356

Herman, the answer to that question is Alois Ruf. He does it by dropping in a modified engine into a Boxster or Cayman (a 981S engine is a detuned base 991 motor, no?). Not the answer you are looking for but something we should all know about re: a Boxster/Cayman hp potential!

http://wot.motortrend.com/ruf-transf...va-339273.html

Saludos,
Eduardo

allegretto

Wow, Sir!

3800S

are they doing that here I wonder...

Jim in St.Louis

Throttle body, plennum, flash, headers, upgraded exhaust and the under drive pulley will cost you about $4,000 plus labor, although you can do it your self. I have done these to my Cayman and I am delighted with the result.

stevecolletti

I'm pretty sure BGB had a post in the Cayman forum offering to put the 3.8 in the new car.

allegretto

3.4/3.8 X 414 = 370

55 HP in this car would be felt very well.

Why can't one do the same specific output from just tuning it somewhat like the 3.8S engine... no?

GentlemanRacer

Did all of that except the underdrive pulley. Started with a base cayman R, added what you mentioned and put in a heigo cage. Took out the seats, replaced with lighter ones. Last thing is some cosmetic weight reductions and HP/Tq seems endless.

Started at 330, now up to around 360HP

And loving it

Beantown Kman

GentlemanRacer: Whose throttle body, plenum, flash, headers and exhaust did you use? Are you happy with the Heigo? I just bought an R and I'm thinking of doing the same.

GentlemanRacer

IPD plenum and GT3 throttle body.
Evoms tune
Cargraphic headers and exhaust.

Heigo is the only way to go!

I have pics somewhere, will post if I find them.

Hope this helps.

mooty

BGB is ur friend, talked to john teece

Jim in St.Louis

I used: Miltek exhaust, Schnell headers, Softronic flash, throttle body, & plenum, plus Mantis underdrive pulley. The Softronic parts were the sizes they suggested.

Marine Blue

For those that have done these mods, did you document what the Hp changes were with each step and or a before/after all steps were performed?

Most of these mods seem easily reversible, can anyone confirm?

Pearlcoupeg35

In for the pics. Thinking of doing the headers, plenum, and GT3 TB myself....then tuned. What are your thoughts on the tune? Did a shop "Custom" tune it or is it a plug in tune?



See my comment above.....and how important is the UD pulley? what does that do in terms of the power/tq increase?


Thanks!

Jim in St.Louis

Unfortunately I didn't have the car dyno'd before the mods and I have since learned that dyno's vary quite a bit and can be differnt from one day to the next based on temperature, humidity, maybe even the color shirt you are wearing??
The UD pulley was mostly to protect the PS pump, but they say about 6 HP. The weird part about installing the UD pulley is cutting off a hunk of the aluminum block.
The flash was Softronic, so I just downloaded the stock info via the OBD2 and then a few days later, downloaded the new information the same way I did before. Although, I did go to the shop who dyno'd the car to give me input on installation of the flash.
There is lot's of information on line for all of the mods I did.

tcsracing1

after you have done the bolt ons, go for a 3.8L GTS engine