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High Comp And E85

Simon-S14
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bradsm87 Proficient

bradsm87

Posted
Posted

Rekon something bigger will work well?

Ive done T28 (works good on 9.5:1), 28RS disco, TD05H 18G. The Disco was very fail, I suspect due to cams, the 18G has gone over 200kw but pings with any more than 15 pounds.

My 10:1 motor has been shit from word go, all other 9.5 motors Ive done have at least always been fast. Im currently rebuilding my old DET to make way for an FP30, unless you rekon the 10:1 motor will take to the FP30 as is ? lol, id try it if there was merit (want to stay 98 though).

10:1 would work well with 98 but only with upgraded cams, a bigger turbine housing and low-ish boot. No need to run big boost wen u have high comp, cams and very little backpressure in the exhaust manifold.

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jet_r31 Mentor

jet_r31

Posted
Posted

Someone sponsor me and Jez to put some ethanol in my SR.

My current SR is 10:1 and very det prone. I wouldnt mind letting jez see if the pineapple juice makes it a monster, would be good for everyone to see.

For science ;)

can't you just fit that water injection kit you have?

cheers

darren

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

I will pay for 40L of E85 if u wanna try the real mans fuel.

But i think the boys are right maybe weve been trying the wrong setup and we need a bigger turbo. Lets try that gr3040 highmount setup i have waiting for u. For the price its a bargain.

STATUS Grand Master

STATUS

Posted
Posted

10:1 would work well with 98 but only with upgraded cams, a bigger turbine housing and low-ish boot. No need to run big boost wen u have high comp, cams and very little backpressure in the exhaust manifold.

Exactly, that combo of GTScoT is a real mismatch way too much exhaust pressure... high comp small rear always ends in ping city. What are your exhaust temps?

Perfect E85 contender though for response / vs power..

GTScotT Grand Master

GTScotT

Posted
Posted

Thanks for the pointers guys.

Weird thing is though, the first setup I went to tune with was a GT28RS with a .86 rear... Jez will confirm that after we swapped out the rear housing for a .64 it made an identical amount of power (tune needed to be backed off though).

You guys are tempting me to try harder with the DE+T but im realistically worried its just going to be another bout of CRAP. Am currently in the process of getting my old DET checked so i can buy some pistons for it :(

can't you just fit that water injection kit you have?

cheers

darren

I decided against it as my setup has proven too unreliable at the moment, i wouldnt want it to be useless without the WMI.

if i could get it to a point where WMI was an added bonus for big power but without was still awesome i definitely would.

STATUS Grand Master

STATUS

Posted
Posted

Thanks for the pointers guys.

Weird thing is though, the first setup I went to tune with was a GT28RS with a .86 rear... Jez will confirm that after we swapped out the rear housing for a .64 it made an identical amount of power (tune needed to be backed off though).

You guys are tempting me to try harder with the DE+T but im realistically worried its just going to be another bout of CRAP. Am currently in the process of getting my old DET checked so i can buy some pistons for it :(

I decided against it as my setup has proven too unreliable at the moment, i wouldnt want it to be useless without the WMI.

if i could get it to a point where WMI was an added bonus for big power but without was still awesome i definitely would.

on E85 it should be sweet, we did a high comp E85 S14 Sr20det with poncams and GT2871 and made 269rwkw on sensible boost... and stopped due to no injector left...
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

on E85 it should be sweet, we did a high comp E85 S14 Sr20det with poncams and GT2871 and made 269rwkw on sensible boost... and stopped due to no injector left...

Problem is though he wont do E85 as its not available near him at this time. , trust me i have been trying since i first met him and his de+T setups

STATUS Grand Master

STATUS

Posted
Posted

Problem is though he wont do E85 as its not available near him at this time. , trust me i have been trying since i first met him and his de+T setups

aah then WMI is the only option. Same result as E85 just requires a decent controller.
GTScotT Grand Master

GTScotT

Posted
Posted

Also, what's the go with timing when tuning these things? Coz when we started at zero its knocking its guts out before you hit 3 degrees.

What's going to happen if you magically start at base timing (IE 15) and go from there? For science, obviously.

STATUS Grand Master

STATUS

Posted
Posted

Also, what's the go with timing when tuning these things? Coz when we started at zero its knocking its guts out before you hit 3 degrees.

What's going to happen if you magically start at base timing (IE 15) and go from there? For science, obviously.

but what boost are you starting at?, 0-3 degrees is going to make the egts go waaay through the roof.... you need to start real low boost wise and watch your timing table as its is going to limit your boost dont let your boost determine your timing. Always aim to make as much power as safely possible on the lowest boost.

GTScotT Grand Master

GTScotT

Posted
Posted

lesson learnt, we were starting at a bar.

so in theory if we started at 7psi and went for a mega aggressive tune, then fine tuned to compensate for boost as it increased.... we COULD have got there?

on the disco, it ended up with 210kw (regardless of .64 or .86) but extremely laggy. I had civics motoring away from me out of corners at wakefield.

STATUS Grand Master

STATUS

Posted
Posted

lesson learnt, we were starting at a bar.

so in theory if we started at 7psi and went for a mega aggressive tune, then fine tuned to compensate for boost as it increased.... we COULD have got there?

on the disco, it ended up with 210kw (regardless of .64 or .86) but extremely laggy. I had civics motoring away from me out of corners at wakefield.

yeah if it was a 16psi base actuator you were stuck, no good unfortunately. i reckon if you got a 6psi gate and started from there you would have been sweet.

Check it back on with WMI, did i read you had a kit? even at 16psi you should get about 8 degrees in it.

GTScotT Grand Master

GTScotT

Posted
Posted

agreed yeah.

well give it another go with the 9.5:1 kando, but im gonna build the lower comp motor for my s14. I do have the WMI kit at home but im wanting to go an FP30. Already sold the disco so its just T28 powered for the minute. Might bring that for a retune if i get bored hehehe

  • 3 weeks later...
  • 2 months later...
MRHD66 Rising Star

MRHD66

Posted
Posted

dont want to be shaving the head that much to increase compression... you'll reduce the cumbustion chamber size.

need custom pistons with a higher crown height.

Would love to build a stroker RB28 with 10.5 - 11:1 CR balanced within a micron of its life to allow it to rev, Nitto spline drive pump to keep it lubricated. would be fairly nuts i would thing

cp can do custom pistons

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