Five12Free

ajw45

RL is the best first world problems support group on the interwebs

BGB Motorsports

Yes, after much consideration we decided to give this thing even more cowbell to try and achieve "ludicrous speed!" Stay tuned, as we are waiting for 2 final components that are due to arrive Monday/Tuesday of next week.

Then we assemble the engine and head to the dyno!

RichFL

You're killing me - lol.

tcsracing1

How many Caymans have you whispered on this year already?!

BGB Motorsports

After several setbacks and a shipping mishap that sidelined us yet another month, the strongest Cayman/Boxster engine conversion we have ever executed is now complete. We owe an enormous amount of thanks to the car's owner for his patience. We have never ever ever ever had a car in our shop this for as long as this car has been here. We had a miscue with our machine shop and then UPS dropped something and then it seemed like 1 thing after another when it came to getting our parts in hand. We both began to wonder if this car would ever again be released from solitary confinement! HOWEVER, since apparently good things come to those who wait, we now have this to show for it.

We find it best to do a pre and post dyno analysis because every dyno seems to always read differently and we have to see the gains for ourselves before we release the cars to the customer. I have been going to the dyno more and more frequently with cars with standard bolt-ons because we have seen claims that you can get almost 450hp from a Cayman GT4 with an intake, exhaust and ECU upgrade but we have never been able to reproduce those numbers ourselves when we dyno them. Of the dozen GT4s we have dyno'd with different iterations of exhaust and tune combos from different tuners, they all dyno within 5 hp at or near the 365rwhp number on our Dynojet in town and this car was no different.

The blue line is how the car showed up on our doorstep with aftermarket exhaust, intake and ECU upgrades that were done prior to its arrival, none of which we were involved in selling to the owner. The red line is from today.The car is running 91 octane. The before and after peaks gains are + 80rwhp and + 40 rwlb/ft but at 7K RPM where the Cayman intake begins to starve for air, the numbers are +95rwhp and + 81rwlb/ft. These motors need to breathe and the gains are attributed to the addition of the stroke increase to 4.0L, a further bore increase to 4.25L, the addition of the X51 Power Kit with additional CNC porting and upgrading to the Cargraphic catless race manifold.

The owner was tired of the senseless GT3 bullying that occurs on race tracks across North America and we feel that we have finally leveled the playing field! Per the same 12.5% drivetrain loss number that i have used for the last 15 years, this equates to 506 hp and 383 lb/ft at the crank. At the moment the engine is still relatively new and we therefore did not opt to spin the car over 7600 RPM. When it's broken in and in the hands of the owner, it will be pushed further.

85Gold

That is all.

Peter

usctrojanGT3

Wow, amazing!

pleasereset

That kind of post makes me want to send you my car... any word on the price tag?
Is the 4.25l a DeMan or something homemade?

95spiderman

awesome! what is expected redline? 9k?

BGB Motorsports

I am at home studying the dyno logs. I think we can find some more up top! Thank you!

Thanks buddy...i hope that all is well.

If you want to reach out and call either Wray or myself at the shop we can get you a quote.

We partnered on the first 4.0Ls builds but to Rick's credit, DeMan was the first to go one step further and push the edge of the envelope with the first 4.25. We had this 4.0L build in progress at the time and the customer wanted to be on par with the latest and greatest offering and the parts already come from all of the same places that we had used in the past so we executed the same approach as well and followed suit. We have continued to collaborate on the approach and the findings. The only other shop i know of personally that has done this would be Ehresmann Automotive in Germany and if i am not mistaken, these are the only shops in the world we know of doing these builds on these motors at the moment. Lots of other shops that specialize in GT3 engines do the same thing and take the same approach. We just specialize in the street based 9A1 DFI platforms.

BGB Motorsports

Unfortunately we can't spin it that high. We don't have the ability to tune any of these cars over 8200, as the software physically won't allow it. You would have go to standalone or remove the rev limit entirely and then you couldn't fine tune anything in increments. Most importantly, you don't have the high revving drivetrain bits that are in the GT3 motor.

95spiderman

still pretty good, id say

BGB Motorsports

In response to driveways that eat chin spoilers, the owner opted for an Umbrella Auto front and rear axle lift kit; the false floor was fabricated in house. This kit mates to a JRZ double adjustable coil over setup.

d00d

This may allow me to reach my beach house, what's the breakover angle at full height?