Clemson Sports Car Club

This car belongs to Shane from Woodruff. He attended our Dyno Night, and after making a base pull, he decided that the street tune from the previous owner was not up to par.

Here is the setup:

B18c
9:1 CP Pistons
Eagle Rods
ARP Head Studs
Stock Head
Stock Cams
Skunk2 intake Manifold
70mm Throttle Body
Hondata Intake Manifold Gasket
Ramhorn Turbo Manifold
50 trim eBay Turbo
Walbro 255lph Pump
780cc Injectors
Adjustable FPR (base pressure @ 55 psi)
GM 3bar MAP Sensor
Tial 38mm wastegate
93 Octane
Tuned on Crome Gold with boost by gear

This is the base pull (street tune one eCtune) vs the 14.5-15.5 PSI tune on Crome Gold. For the record, we don't feel that tuning software plays a part in the final result, but what you see here is the difference in a street tune, and a more comprehensive dyno tune.

nice numbers!

Does anyone in the Honda world ever tempt to go lower compression than 9:1? They could make big hp gains in the pump gas department

(06-06-2010 01:55 AM)VR4Drive92 Wrote: [ -> ]nice numbers!

Does anyone in the Honda world ever tempt to go lower compression than 9:1? They could make big hp gains in the pump gas department

not really. all you do is get more lag.
450-500 whp is doable on pump at 9:1

(06-06-2010 07:14 PM)dave99rt Wrote: [ -> ]

(06-06-2010 01:55 AM)VR4Drive92 Wrote: [ -> ]nice numbers!

Does anyone in the Honda world ever tempt to go lower compression than 9:1? They could make big hp gains in the pump gas department

not really. all you do is get more lag.
450-500 whp is doable on pump at 9:1

and I bet 600whp is doable on 7.5:1 LOL

I like pumpgas power

(06-06-2010 10:58 PM)VR4Drive92 Wrote: [ -> ]

(06-06-2010 07:14 PM)dave99rt Wrote: [ -> ]

(06-06-2010 01:55 AM)VR4Drive92 Wrote: [ -> ]nice numbers!

Does anyone in the Honda world ever tempt to go lower compression than 9:1? They could make big hp gains in the pump gas department

not really. all you do is get more lag.
450-500 whp is doable on pump at 9:1

and I bet 600whp is doable on 7.5:1 LOL

I like pumpgas power

The point of having a pump gas tune is so you can have fun on pump gas. Waiting forever for the turbo to kick in isn't fun for most people =P

To use my setup as an example, it's around 600whp on pump gas with 9:1 compression. 40K miles down the road and have yet to touch the motor. It's all in the tuning. However, if I could do it all over gain, I would of went with the stock compression of 11:1. It's not laggy by any means, but generally speaking throttle response would improve and more power could be made on less boost.

---

The chart below reflects the a/f ratios from the base pull on the street tune from the other tuner. Regarding the areas where the ratios drop flat to a 10, what's actually happening is that the motor is running so rich that the wideband can't even register. I wouldn't be surprised if running that rich on the previous tuners street tune has washed out his pistons and contaminated his oil.




For the record, owner stated the gauge registered 18-20psi on the street tune and that he would hit boost cut on 4th gear. Being that we were on the 80% duty cycle range while tuning at 15.5psi, I too can see that the boost gauge wouldn't read accurately because there is no way that there was enough duty cycle on the injectors to support another 5psi. Logically, it makes perfect sense that the gauge wasn't reading accurately. For those who don't know, Crome Gold can't datalog an eCtune file and the reverse is also true.

---

Can't wait to see how much time that beast gets on the track /w pump gas and nice car btw.

(06-08-2010 01:51 PM)ijdmtoy Wrote: [ -> ]Can't wait to see how much time that beast gets on the track /w pump gas and nice car btw.

sniff, sniff....... do i smell SPAM? how about an intro thread, who you are, where you're from, what you drive yadda yadda

(06-07-2010 10:49 AM)humjaba Wrote: [ -> ]The point of having a pump gas tune is so you can have fun on pump gas. Waiting forever for the turbo to kick in isn't fun for most people =P

Lag is overrated... full boost is just one downshift and brake boost away...


You guys should ride in a real big turbo car sometime

Agreed. For the most part, I like a street car with little to no lag. But, there is nothing like the feeling of a huge turbo finally spooling and the power coming on strong.

Would I be wrong to guess that most of the guys here have never been in a higher HP turbo car?

(06-08-2010 06:56 AM)Spent Wrote: [ -> ]It's not laggy by any means, but generally speaking throttle response would improve and more power could be made on less boost.

---

Why are people so worried about the number of boost pressure?

Why are people afraid to run high pressure ratios?

(06-08-2010 06:16 PM)VR4Drive92 Wrote: [ -> ]

(06-07-2010 10:49 AM)humjaba Wrote: [ -> ]The point of having a pump gas tune is so you can have fun on pump gas. Waiting forever for the turbo to kick in isn't fun for most people =P

Lag is overrated... full boost is just one downshift and brake boost away...


You guys should ride in a real big turbo car sometime

Cough, Seth, Cough

fastest vehicle i've ridden in was sam corke's evo, a few versions ago. i believe it was the first iteration of the gt35 setup, and while it moved out pretty fast, i know there are faster cars out there. didn't seem laggy, it just had a higher-end powerband, but so did the stock car.

it all comes down to uses/goals though. huge power, higher boost, more time to spool vs. moderate power, lower boost, and quick spool.

1 question: how much different is the cylinder pressure/stress on the motor between the two setups(high compression, low to moderate boost vs. low compression, higher or much higher boost)??

Just looking at the basic physics of it, the same pressure should yield the same torque, just a matter of at what RPM. It is just a matter of the other aspects of things like flow, and turbo size. I would prefer a higher compression low boost motor myself.

I prefer low static compression and high boost.

Those engines always have higher hp potential when shoving air down its throat. But I'm a power guy.