I do have M engineering. Not sure about any E85 option though. My car is on full jungle juice mode all the time

 

Do you have a sound clip with the new zaust set up? @JAhmed

 

Not yet. Distracted by the cars new roommate

 

Oh I need to hear this.
I guess I’ll have to recalibrate my Bat****Crazy ExhaustOmeter!!

Let’s get these in a tunnel @JAhmed !!

 

someone get me some gold BBS e88 for my birthday. I nominate @mooty

 

E88s are the only answer. Mine were here before the car was.

 

Questions about the Deman 4.5L:

1) Expanding on post # 72…
[https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-spyder-25th-anniversary/1286917-another-completed-deman-4-5l-718-impression-review-5.html#post17936460]

What is the approximate peak horsepower figure of the 4.5L engine that is intended to be strictly a 93 Octane engine with very spirited street driving (full throttles and redlining through the canyons) without any intention of ever putting higher octane/race fuel/octane boost in it? (Do we have a peak torque figure for the same scenario?)

2) Is the engine redline the same on the 4.5L as on the stock donor engine? (Please answer for the stock 3.8L 981 engine and the stock 4.0L 982 engine.)

 

4.5L conversion has unchanged redline from stock: 7800rpm for 981 and 8000 for 718

 

Thrilled to be joining the midwest chapter. Arrives in a couple days

 

Cool! So, would this be based on the original 3.8l from your car or was the 4.5l built from a different engine or core?

 

It's a 4.5 based off the original 3.8. It's got the Deman flywheel, clutch, race headers, x-pipe, short gears and LSD

Just needs its break-in miles

 

As someone who went with the same, but silent, I had a mild thought about wanting to go unsilenced, but realizing how loud my car is when driving by pylons or walls...or god forbid tunnels, I can completely appreciate and respect your decision to go unsilenced. The silencing does drop a few dBs, and these are logrhythmic values, so dropping a few dB at that high of level is very significant. I hope you're enjoying the heck out of it, and Jonny has done a fantastic job with these. I'm glad I'm not the only one who felt like they found some serious power, but of course I don't have the delicious 4.5 either. If you would ever care to, it is pretty easy to swap to the silenced bits as well.

 

What headers does deman use?

 

My 981 GT4 is about ready for a trip to Nyack.

 

Ugh, no 4RS.... I was hoping you would get one of those over the Rick for the deman treatment!