Mrsideways

2006 S2000 Racecar
Kpro converted back to a Cable throttle by Mase
PLM header
DIY 2.75 inch exhaust to magnaflow muffler
Stock Intake
No cat
Fresh Honda Shortblock (5 weekends)
Endyne Cylinder head.

TL MIG

Honestly, I'm not a braniac at all this but it sounds like you might need a tune man.. H/TP/Ex/INTAKE gets the A/F a little off, but damn those are like stock numbers..

jh4db536

Updating my first post.
So my mods are [a very well known complete exhaust system - header, 63mmHFC, catback]
all tuning done with a Series2

All runs are with silencers installed (except on the dynojet research)...I ran the exact same calibration without silencers and made 5whp more on a dynojet research (Raceline Dynoday at the end of august 2011 resulted in making 5whp more than my bonestock baseline )

Started off from the last post stock tuned 227whp on a dynapack (vtec not 100% optimal@5800, but AFRs good), added [an engine back exhaust system] without changing the tune resulted in LOST ~10 to 15whp.



At 13.2AFR@WOT and it's coming alive again. Didn't make much peak ~5whp, made a LOT of low and mid end.

Due to the mods a lower vtec to 4700rpm was possible and results in big gains.

When im finished with this im going to attempt to tune it with the silencers out and see what it can do.


The blue line represents the above dyno WITH silencers in, if i use the data that i captured from that exact run it will generate a curve within +-1WHP to the actual dyno session above.
i have all AEMlog/STF log files including the one i captured on a real dyno itself if anyone wants to reproduce this data.

Moral of the story is you need tuning for all these little bolt on mods otherwise you might get nothing or lose some power. Pretty deceptive for the butt dyno to feel the acceleration from the weight loss, while the engine actually lost power.

H22toF20

I only put down 184whp/129 ft lbs on a Mustang dyno; probably 80-85* out. I remember reading a thread on here that showed a header loosing power due to having so many mods without tuning. The tuner said I should see great gains with a tune but I already knew that. PS That was on the same dyno Evan used.

My mods were
F20
modified FIPK(3" aluminum pipe, BPI velocity stack, AUT plate)
Berk coated header
Hytech 3" test-pipe
HKS 75mm single

I'm jealous of you Evan. I made the 184 and Calvin only made 174 on that dyno. They're F20's but dang that's a big difference in power. I wonder if the air temp really makes that big of a difference.

S2k-2NV

Bone stock dyno run at Performance Race Engineering was 201hp and 142tq. Now it is currently sitting at 229hp and 170tq. Vtec is set at 5500 and redlines at 8700.

Mods:

K&N Fipk Intake
Top speed headers
63mm berk high flow cat
Invidia Q300
Hondata flashpro

H22toF20

^do you have a better picture of the dyno plot? Looks to be a nice smooth VTEC transition and good numbers. I'm not sure who I'm going to have tune mine, if I don't do it myself. AEM EMS is a PITA.

S2k-2NV

I can't figure out how to make it bigger. The transition is smooth into Vtec and runs great. I had mine tuned by Bobby over at PRE in Portland as he has always tuned my other previous cars in the past years. Definitely no complaints and it is worth the money to have the pros tune it .

H22toF20

My Prelude I bought had an H22A swap done by PRE(my first car). It had a vacuum leak and 2 CEL's. This was years ago but still...not sure who will tune it, if I don't.

kial007

[attachment=10272:dyno.jpg]
262whp 195wtq
K24 crank
IP Rods
Mahle 87.25 pistons
Hytech header
Greddy SE dual exhuast
AEM V2 intake
ID725cc Injectors
Hondata Kpro

H22toF20

^Nice. Have you had any issues with that compression on pump gas yet?