B18A block (85.5mm bore)
B18C head
JE Pistons/Eagle Rods
Victor X intake manifold
LoveFab SST exhaust manifold
SC61 60/.63
PWR IC
3in downpipe and exhaust



9lb spring on a 38mm Tial....getting creep from 6700rpm on up to 15psi at about 8400rpm Need a 40 or 46mm Tial.

Peak Torque seems a little low for me, especially considering the bore. Any comments?

 

i take it this was on pump gas??? what management are you using??? nice numbers.

 

interesting motor combo!
nice job

 

85.5mm bore? Whoa.

Good job nonetheless.

 

Very nice. What compression ratio?
Robert

 

Nice numbers. For some reason I was expecting a lot more torque than that.

 

Congrats bro. The torque does seem kinda low for your displacement though. Was this on pump gas with a boost retard?

 

John is a wonderful tuner. Nice numbers!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vadian &raquo;</TD></TR><TR><TD CLASS="quote">B18A block (85.5mm bore)
B18C head
JE Pistons/Eagle Rods
Victor X intake manifold
LoveFab SST exhaust manifold
SC61 60/.63
PWR IC
3in downpipe and exhaust



9lb spring on a 38mm Tial....getting creep from 6700rpm on up to 15psi at about 8400rpm Need a 40 or 46mm Tial.

Peak Torque seems a little low for me, especially considering the bore. Any comments?</TD></TR></TABLE>

Weird you are making your peak torque at 8300 which is really really high. There was discussion on this recently I believe on a Prelude set up where the persons turbo peaked torque real high like that. Great #s none the less. What did John have to say about it?

 

9lb spring on a 38mm Tial....getting creep from 6700rpm on up to 15psi at about 8400rpm Need a 40 or 46mm Tial.

I don't think the 38mm WG is the problem. My 35mm works fine with 24-28psi. What boost controller are you running and where is the wastegate placement on your manifold? Its also hard to say about the tq since it looks like boost is spiking after peak tq on a LS.

 

You are using your 35mm for 24-28 psi?!! What pound spring do you have in yours? I have the 35mm Tial, and every now and then, at complete RANDOM I will get serious boost creep in 4th gear, and only 4th gear, most of the time it holds STEADY at 1.0 BAR. However I only have a .35 BAR spring, using a GM boost solenoid and AEM EMS for boost control. I am planning to get a 40mm tial .8 BAR spring.

 

torque is low because you are boost spiking.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vadian &raquo;</TD></TR><TR><TD CLASS="quote">


9lb spring on a 38mm Tial....getting creep from 6700rpm on up to 15psi at about 8400rpm Need a 40 or 46mm Tial.

Peak Torque seems a little low for me, especially considering the bore. Any comments?</TD></TR></TABLE>

Here is information from Tial about wastegate selection and theories

http://www.tialsport.com/technical.htm

"Flow capacity. Contrary to popular belief, larger higher HP applications do not necessarily require the largest wastegate available. The lower the boost pressure you are gunning for the larger your wastegate needs to be. An engine/turbo combination that is set to 25+psi has a smaller wastegate flow requirement than the same application set to 7 psi. This is because the wastegate is used to lower the boost not raise it, the lower the boost pressure is set the more flow the wastegate must allow. "

 

I would think there isn't more low end TQ because he said all he is running is a 9 pound spring and he doesn't hit higher boost(more TQ) until later?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teamrocket si &raquo;</TD></TR><TR><TD CLASS="quote">Very nice. What compression ratio?
</TD></TR></TABLE>

 

I had a lot of challenges in tuning this car and it wasn't due to the Hondata. There are quite a few small things holding this car back from making truly huge numbers but even at this level it's quite impressive I think. Car was a blast to drive on the street!

 

Thanks Boostfed! I have never heard that about wastegates before. However it also says that if you have an efficient turbo which creates less backpressure in the manifold, and not so great wastegate placement that you will have to use a larger wastegate, so it sort of contradicts itself .

 

So basically was this at 9lbs? or 15lbs lol?

 

Impressive #'s!

 

Very nice, post up pics.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BodyKits NW &raquo;</TD></TR><TR><TD CLASS="quote">So basically was this at 9lbs? or 15lbs lol? </TD></TR></TABLE>

peak hp # is at 15lbs, but the car won't run as hard as the peak # would imply because of the boost spike.

 

Yeah it better be 15lbs..... if its making that power at 9lbs....... I'm throwing my physics minor out the window

 

85.5 on stock b18a sleeves?

 

very nice! That's exactly what i'm hoping for on this simple build up i'm doing. Shooting for 400hp w/ stock sleeves for now! Very motivating for me! Great work.

 

Wups! Left out some key info.

-Yes, this was on pump gas...93 to be exact.
-Compression ratio is 9.5:1
-Stock sleeves? Ha! I wish...well maybe not. Got Golden Eagle sleeves.
-Using an OLD Hondata 4b. Base maps suck'd! Nonetheless John is an <U>awesome</U> tuner and worked past them! Definitely way worth the 4hr drive. John and his co-workers

As for the creep, I'm using the Profec B with the dip-switches set to "external wastegate" I'll fiddle with those to see if there's any difference. I doubt its the placement of the wastegate; its right off the front of the collector similar to the Full-race's manifold.

Thanks for the comments and info guys!