lost hp

MR Bender · Post by **MR Bender** » Sun Apr 05, 2009 11:41 am

hey
got my car tuned it made 164bhp at 6000rpm 13psi

it is a vr4 motor stock sort of set up 3in,fmic,wolf3d,fuelpump etc

the last time i got it tuned it made 256bhp was made on 18psi where has my power gone????
the basted packed him bags and left!!!

anyway got any idea what could cause it?

thanks

coop1er · Post by **coop1er** » Sun Apr 05, 2009 12:37 pm

What changes have been made between dynos? Where the 2 runs on the same dyno? You also are 5psi lower than last time too.

MR Bender · Post by **MR Bender** » Sun Apr 05, 2009 1:20 pm

same dyno ,different intercooler,and ecu
and less boost

iXNAY · Post by **iXNAY** » Sun Apr 05, 2009 3:37 pm

boost is what makes these engine have so much power!

thrash · Post by **thrash** » Sun Apr 05, 2009 3:57 pm

5 psi ===> 90hp

wow lol

redzone · Post by **redzone** » Sun Apr 05, 2009 6:13 pm

run a cat? could be partially melted.

MR Bender · Post by **MR Bender** » Sun Apr 05, 2009 7:19 pm

no cat!

www.18u · Post by **www.18u** » Mon Apr 06, 2009 7:50 am

So you are saying nothing has changed except the tune? What was the reason for the re-tuning then?

benny · Post by **benny** » Mon Apr 06, 2009 8:17 am

you didn't take any stickers off?? those things are worth some HP especially NOS ones they are easily 100hp on their own!

Post by **TOMSUN** » Mon Apr 06, 2009 9:07 am

Does the car feel like it has a lot less power?

5psi will make a big difference, could be 30 to 50hp... but 90hp, that is a bit of a stretch.

Do you have the 2 dyno graphs to compare?
Where on the graph were they different in power?

Did they load the wrong map into the wolf?

Did they change the timing in the tune?
Has your base time changed some how?

*************
http://forums.austarion.com/viewtopic.p ... light=dyno

In the past you said it was a EVO3 motor, with a microtech?? (or is that a different motor running the same power?)
http://forums.austarion.com/viewtopic.p ... o&start=90

MR Bender · Post by **MR Bender** » Mon Apr 06, 2009 2:04 pm

yer i should make this a bit more clear sorry guys.
Im only going on what my other car made on the dyno with my old stuff. this is a diffrent car but it has my old turbo and manifold inj gearbox
But it has a vr4 motor not a evo 3 and less boost.
Could less boost and vr4 motor really make that much diffrents ?
And how much power does a stock vr4 make? I thort it was more than that?
Sorry i should off made it more clear

Website · Post by **WidebodyWoody** » Mon Apr 06, 2009 2:44 pm

Ok...

I believe the Evo3 cams would have helped, plus the bit of boost.

It is also possible that the engine is more tired, but that is just speculation

S0LJAH · Post by **S0LJAH** » Mon Apr 06, 2009 3:12 pm

vr4 cams and evo 2/3 cams are the same
however evo 1 cams are slightly different

evo 3 motor is higher compression tho

i would say the 5 psi would account for roughly 50 hp

so u may get up around 210-220hp

MR Bender · Post by **MR Bender** » Mon Apr 06, 2009 3:18 pm

yer cams and boost would make sence
But i would of thort it would off at least made 200atw but i spose it would make that much diff

www.18u · Post by **www.18u** » Mon Apr 06, 2009 3:36 pm

Mate the motors are very different. Vr4 runs a 14b turbo and the evo will be a 16g of some type with around 100 cfm more flow. your injectors are 450cc in a vr4 and a evo 1-3 will have 510s. As mentioned above the compression ratio is different, as well as the cylinder head and inlet manifold design. Bottom line is you will not make the same power on the same boost levels. Put a 16g on it and some 510's and tune it too run 20psi and it will make the numbers you require. Did you hook up the cyclone runner setup in the manifold? that will be another issue unless it is locked open.

Austarion

lost hp

lost hp

Who is online