What compression ratios are you turbo lot running

[oprn]

Yes I agree, it's all about CFM.

My '03 Cummins starts boost at about 1100 rpm and red lines at 3100rpm and about 320 HP.

So 5.9 ltr Cummins is 3.69 times more CFM than a 1.6 ltr VW. Therefore I could expect the VW with the Holset to start boost at 4,060 rpm and deliver about 300 hp at 11,440 rpm. Now increase the VW to 2.3 ltrs and we get an engine 2.57 times smaller in CFM out put. Run the numbers and you will start boost at 2,830 rpm with 300 hp at 7,970 rpm.
The first engine would be very short lived and virtually impossible to try and drive but the second one would actually function at the drag strip.

Yup, sounds about right in line with what you are saying.

All theoretical naturally but sounds reasonable.

[AKSTEWIE84]

Whos header is that?

[madmike]

AJ sim's, CarCraft ,Brothers, pick one LOL
I've heard sims won't sell just the header
I'm very happy with my CarCraft

_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[madmike]

I should of said both of my CarCraft's I have two,lol
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[slalombuggy]

I'm running 8.3:1 in my 2332

brad

[Dauz]

Wish those hideaway headers came in 1 3/4”

[HotStreetVw]

[buguy]

[HotStreetVw]

Tell us more about your setup Brad, or post in a new thread so we can follow along.
_________________
4inBhore
50 Split - 2724cc NA. Haltech injected
62 Notchback - 2542cc Turbo WIP

[buguy]

[Dauz]

My over the alternator header is 1 3/4" feeding a full sized T4 with a 4" inlet. I also have 46x40 valves and an 86mm stroke.

But with that said, I've previously ran a T60-1 HiFi with a 1 5/8" OD header and dyno'd at just over 400hp (wheel) in a street driven T1.

Both headers came from AJ.

I've been wanting to tuck it all away and it seems my only option is a made-to-order RLR.

BTW, I can't remember what my static CR was set to on my new motor. We were only concerned with valve clearance (ACN Squishies).

[Dauz]

[buguy]

With squishies, I would guess your near the 9:1 range.

[Splitdog]

My chambers are 78cc. That would render squishies quite moot.
_________________
CH³NO²

Z = z² + C

Der Blitzkrieg Kafers

#notacallooker

[buguy]

I'm at 7.8:1 compression. I run E85 mostly (Flex fuel sensor) though. 30 psi of boost before the cam change, and 23 psi so far on the new one. I also run a water to air intercooler.

[madmike]

I'm waiting on Santa to bring me a Snow water/meth kit
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[slalombuggy]

[Dauz]

[slalombuggy]

I sold it to a friend of mine. I'm building a 1904 for it . Every time I see a picture of the car I regret selling it. It might end up back with me some day, who knows. Had a lot of fun on the street with that car. This would be a fun combination.....

brad

[buguy]