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[b20beast]

So heres the setup!

B16a
SRP 8:1 Cr Forged Pistons
Type R cams.
12psi T3 T4 60Trim .63
2.5" Exhaust
Ebay Cast Manifold

I went on the dyno, baseline was 211whp =( at 12psi  !? 
i dont know what happened?!

I ended up adding 6Degrees of timing from 5500-Redline [from 1* per psi retard]
Ended up with 246Whp 178Wtq.


Power falls off hard after 7700rpm!
and peaks about 7500rpm.

This was tuned on 91OCT.

From my research i should be close to 300whp give or take a few.


Any ideas of what is happening here?
How is it possible to baseline at 211whp on 12psi with 1* per psi boost retard.




Also to be noted, i was racing the night after and after a couple pulls, i lost a wastegate bolt!
Im not 100% sure if i had any wastegate / manifold leaks on the dyno, but i didnt hear any leak and the bolt was in.


Thanks guys!

[d112crzy]

who cares. The end result was 246 @12psi. Run it at the track or against some other cars to see how its really doing.
The type of dyno and correction factor has a big role on what your numbers could have been/are.

You're peaking early because you have a restrictive exhaust on a high revving motor.

Plus its a b16. you were set to fail from the start.

[b20beast]

i ran against a 2JZ [LAUREL] Big turbo 500+ horses and won!

[bigdaddyvtec]

No you didnt... Or he wasnt trying.

[b20beast]

No you didnt... Or he wasnt trying.

weather u win by a mile or an inch, winnings winning

[onlyflash944]

ditch the cat

[bigdaddyvtec]

No you didnt... Or he wasnt trying.

weather u win by a mile or an inch, winnings winning

Either youre lying or he was

[b20beast]

i ran against a 2JZ [LAUREL] Big turbo 500+ horses and he won!

fixed

No you didnt... Or he wasnt trying.

weather u win by a mile or an inch, winnings winning

true, but if they are not racing then it doesn't count.

we went from a dig.

mind you, he is automatic... and had some shitty excuse about his 'alarm'

[b20beast]

ditch the cat

no cat, straight 2.5" exhaust


plugs are couple months old, what do you guys think?

[bigdaddyvtec]

Either youre lying or he was

[b20beast]

Either youre lying or he was

so why is it so hard to beleive?

[bigdaddyvtec]

Because Im not a fucking moron....

You live in WA right?

[ryan89crx]

You live in WA right?

Do work 

[Joseph Davis]

From my research i should be close to 300whp give or take a few.

No it won't.  If you'd kept stock CR, sure, but not an 8:1 CR B16.  You're dealing with a lazy port, over cammed, no displacement, over square piece of shit - of COURSE it's sensitive to CR and is now slower than a 225 whp Z6 or Y8 on 12 psi because the 246 it does have only occurs the last 23 rpms before the power falls completely off.

[98vtec]

wtf was the point of 8:1 on a 1.6L.  What kind of dog ass shit is that?  MAYBE if it had some torque to back its complete lack of balls the 8:1 would be ok (SOHC vitara's).

kill yourself.  Go back to HT.

[flat_black]

This thread fails... OP post porn or ban

[Phate]

unhook the vac line from the wastegate, then get back to us.

[lilpooh21186]

that cpr is a fail

From my research i should be close to 300whp give or take a few.

No it won't.  If you'd kept stock CR, sure, but not an 8:1 CR B16.  You're dealing with a lazy port, over cammed, no displacement, over square piece of shit - of COURSE it's sensitive to CR and is now slower than a 225 whp Z6 or Y8 on 12 psi because the 246 it does have only occurs the last 23 rpms before the power falls completely off.

[HiProfile]

If you'd have done research, you'd have seen 10:1 can pull 300+ whp from cast pistons.

If you'd have done research, you'd know JD hates b16's.

If you'd have done research, you'd know Jeff Evans tested a full LS vs full b16 swap with the same kit and the LS spanked it.

If you'd have done research, you'd know you need to start with less than 1*/psi with an 8:1 motor. Much less.



Finally,

If you'd have done research, you'd know to use hemp ROPE when you hang yourself.

[b20beast]

If you'd have done research, you'd have seen 10:1 can pull 300+ whp from cast pistons.

If you'd have done research, you'd know JD hates b16's.

If you'd have done research, you'd know Jeff Evans tested a full LS vs full b16 swap with the same kit and the LS spanked it.

If you'd have done research, you'd know you need to start with less than 1*/psi with an 8:1 motor. Much less.



Finally,

If you'd have done research, you'd know to use hemp ROPE when you hang yourself.

hahah i got my good morning laugh!

this is RHMT, pistons i scored for 75bucks, so wtf right, as long as the car spanks some ass!

[Joseph Davis]

You're dumb, and that block will split a sleeve before you max out a stock piston.

[b20beast]

From my research i should be close to 300whp give or take a few.

No it won't.  If you'd kept stock CR, sure, but not an 8:1 CR B16.  You're dealing with a lazy port, over cammed, no displacement, over square piece of shit - of COURSE it's sensitive to CR and is now slower than a 225 whp Z6 or Y8 on 12 psi because the 246 it does have only occurs the last 23 rpms before the power falls completely off.

so the power falls off early because of the CR?

you said the last 23rpms, u mean 2300 right?

[b20beast]

You're dumb, and that block will split a sleeve before you max out a stock piston.

the stock block was damaged already, so thats why i rebuilt it with forged pistons.

[bigwig]

Post the dyno sheet.  Post more specs.  Post pictures of the engine bay.

Basically what Joseph said is the truth.  You dropped the compression 2 full points.  You're running some pretty decent sized cams with a log manifold which can be problematic (although I don't think it's the issue in your case).  I'm also guessing the turbo is in less than awesome condition, but that's just my guess.

[b20beast]

Post the dyno sheet.  Post more specs.  Post pictures of the engine bay.

Basically what Joseph said is the truth.  You dropped the compression 2 full points.  You're running some pretty decent sized cams with a log manifold which can be problematic (although I don't think it's the issue in your case).  I'm also guessing the turbo is in less than awesome condition, but that's just my guess.

spot on
the turbo when i got it, shaft wouldnt of even spin, so i cleaned it out and changed bearings and seals.


idk but wont i have the advantage of running more boost on pump gas with this low CR?
like 20-24psi?

[malichite]

Flight of the Conchords- Business Time

When's Wednesday?

[98vtec]

idk but wont i have the advantage of running more boost on pump gas with this low CR?
like 20-24psi?

not when you could have made the same power on half the boost and be that much less of a pile of dog shit when not in boost.

[bigwig]

I'd vote on the turbo being the biggest issue.

[turbob16hatch]

idk but wont i have the advantage of running more boost on pump gas with this low CR?
like 20-24psi?

not when you could have made the same power on half the boost and be that much less of a pile of dog shit when not in boost.

Can i get some proof that lower cr makes your car dog shit slow out of boost? I just can't imagine a honda feeling that slow out of boost. Have you driven a dpfi d15 lately nothing is slower then that pile of aids, and somehow i don't see a b16 being that slow.

I had a friend with a b16 9.7:1 spooled a 60/63 57 trim at 4500-4800 (vtec point) so i find it hard to beleave that 1 more point will destroyed it's driveability.

[b20beast]

idk but wont i have the advantage of running more boost on pump gas with this low CR?
like 20-24psi?

not when you could have made the same power on half the boost and be that much less of a pile of dog shit when not in boost.

Can i get some proof that lower cr makes your car dog shit slow out of boost? I just can't imagine a honda feeling that slow out of boost. Have you driven a dpfi d15 lately nothing is slower then that pile of aids, and somehow i don't see a b16 being that slow.

I had a friend with a b16 9.7:1 spooled a 60/63 57 trim at 4500-4800 (vtec point) so i find it hard to beleave that 1 more point will destroyed it's driveability.

yeah bullshit on the lower compression driveability
i hardly notice.

who cares about out of boost, thats the reason i put on a turbo, to drive in BOOST.
i get full spool at 5000rpm

the 246whp is pretty fast once you can put the power to the ground.