Drivetrain SOON TO BE BAPTIZED BY THE JESUS HEAD

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Jul 11, 2007 | 10:11 AM

#76

mozzarella

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Quote:

Originally Posted by PARTSMAN

I hear what you're saying about a tune, Bob.

I think maybe calling the RMW head superior maybe a bit premature.
No one has been able to duplicate(or even come close) to Longboard's numbers with just the head, basic mods and no tune.

Jul 11, 2007 | 10:30 AM

#77

CmdrVimes

Stuck in Reverse

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From: 127.0.0.1

Quote:

Originally Posted by Revolution Mini Works

you of all people should know how tuning affects the car

Of course I do. When I got a CNC-ed head on my car (with the standard valve train) I was 197 HP and ~160 ft/lbs of torque. After the tune I was 223hp and ~180 ft/lbs of torque (with a clutch that was slipping like no tomorrow).

The stock ECU map is in no way able to really make use of all the new airflow with a modified head. All the magic comes on when you tell the ECU (through whatever means, a flash to the stock ECU would be best) about the new operating parameters.

Jul 11, 2007 | 10:51 AM

#78

SpiderX

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Quote:

Originally Posted by mozzarella

I understand but if we simplify it to flow numbers only the RMW head has the highest flow numbers..... (chart was circulated at the Dragon)

The head was at the Dragon and admired by all who saw it including the competition.... Eric, Ryan, Sid and a whole host of others were very impressed with the head.....(which I think is the one on my car with high temp valves) I think it is pretty safe to say that this is a very nice head..... and superior to most including the one that I took off..... I will know more and post the good, the bad and the ugly next week....

Jul 11, 2007 | 12:04 PM

#79

Johan

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From: The Swamp

Quote:

Originally Posted by SpiderX

I understand but if we simplify it to flow numbers only the RMW head has the highest flow numbers..... (chart was circulated at the Dragon)

Too bad I wasn't at the Dragon, I have yet to see flow numbers...but it's not all about flow anway

Jul 11, 2007 | 12:10 PM

#80

SpiderX

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Quote:

Originally Posted by Johan

Too bad I wasn't at the Dragon, I have yet to see flow numbers...but it's not all about flow anway

Jan has a graph from his R&D......

Jul 11, 2007 | 12:11 PM

#81

Partsman

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From: Westerly, RI

Quote:

Originally Posted by Johan

...but it's not all about flow anway

Right.

Jul 11, 2007 | 12:44 PM

#82

SpiderX

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Quote:

Originally Posted by PARTSMAN

Right.

nobut it has been a concern of mine as I am running over 20 psi and I have to be able to flow it

Jul 11, 2007 | 01:02 PM

#83

Partsman

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From: Westerly, RI

Quote:

Originally Posted by SpiderX

nobut it has been a concern of mine as I am running over 20 psi and I have to be able to flow it

You have a point Bob, and as we discussed, you're car is the exception to the rule.

Jul 12, 2007 | 08:36 PM

#84

SHRTSTAK

4th Gear

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Joined: Oct 2005

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From: Huntington, New York

Quote:

Originally Posted by CmdrVimes

I finally found the Helix dyno chart...
Here it is.

You also might want to note that the Helix car had a 17% pulley versus a 15% on RIPPER. The Helix car also had a GIAC tune, while RIPPER doesn't make any mention if he had a tune or not.

So it seems based on his car setup that the gain is completely reasonable.

Thank you. I appreciate it. Looks like I've something new to save for.