cosworth isp head flow numbers

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Jan 18, 2007 | 07:39 AM

#16

240Z TwinTurbo

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Can you flow a stock head so we have a reference for the numbers that I posted?

Jan 18, 2007 | 07:55 AM

#17

jbrown

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Quote:

Originally Posted by 240Z TwinTurbo

These are the numbers that I have

Intake flow at 28.0"

Lift_________Stock________Cosworth
.050________47.5__________47.4
.100________87.5__________93.6
.150________130.9________139.0
.200________168.7________178.9
.250________199.2________211.2
.300________219.3________238.8
.350________230.1________258.3
.400________220.9________268.9
.450________224.2________274.6
.500________226.5________277.6

Comparing 2 different flow benches is like comparing 2 different dynos, you just can't do it. The only way to be fair about it is to do all comparisons on the same bench on the same day.

Jan 18, 2007 | 08:51 AM

#18

240Z TwinTurbo

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If he posts the stock flow #'s I can see if the delta from stock to Cosworth is the same. It should make little difference that they have been flowed on seperate benches. If the numbers are close then his gains can be verified on a seperate bench giving his results further credibility.

Jan 18, 2007 | 09:35 AM

#19

ISPracing

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From: MD

yes when we do another head which will be in about a week we will test stock one to see how it flows
Peter

Jan 18, 2007 | 11:02 AM

#20

ISPracing

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graph with our first prototype head and current head. sorry couldnt test with stock head since we have half inch studs in the block. Both were tested on same boost level and nothing has been changed other than correcting a/f ratio.
peter

Jan 18, 2007 | 03:02 PM

#21

ISPracing

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From: MD

JBrown both cosworth and our heads were tested on the same bench by us on same day

Jan 18, 2007 | 07:28 PM

#22

4cefed

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i have a feeling i might need this head.

Jan 19, 2007 | 07:01 AM

#23

jbrown

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Quote:

Originally Posted by ISPracing

JBrown both cosworth and our heads were tested on the same bench by us on same day

I'm sure they were. I was referring to 240Z TwinTurbo's post that showed the Cosworth head had better flow numbers than what you posted. I wanted people to know that the exact same head on 3 different benches will post 3 different results.

Jan 19, 2007 | 07:02 AM

#24

jbrown

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Quote:

Originally Posted by ISPracing

Holy crap! 9KRPM! Is that a 2.0 or is it stroked? Also, do you have a torque curve to go with this?

Jan 19, 2007 | 07:04 AM

#25

CO_VR4

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It would be useful to post the modifications to your head (valve sizes, for example) to permit direct comparison between, for example, Cosworth valve sizes and what your using. Some rough comparison of cost would also be helpful. Thanks.

Jan 19, 2007 | 10:46 AM

#26

ISPracing

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From: MD

Quote:

Originally Posted by CO_VR4

our street head has similar valves and race heads are bigger

We use supertech valves. Price will be comparable to the cosworth head.
Peter

Jan 19, 2007 | 03:14 PM

#27

Ted B

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Quote:

Originally Posted by ISPracing

Price will be comparable to the cosworth head.

If this is the case, can we assume at this point that the price includes a new ported head, plus valvetrain, and no core due?

Jan 19, 2007 | 04:37 PM

#28

ISPracing

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Quote:

Originally Posted by Ted B

If this is the case, can we assume at this point that the price includes a new ported head, plus valvetrain, and no core due?

yes price will include new head, valvetrain, and no core.
Peter

Jan 22, 2007 | 08:42 AM

#29

ISPracing

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From: MD

jbrown
2.0 motor. I'll post torque numbers later today
Peter

Jan 23, 2007 | 12:54 PM

#30

ISPracing

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From: MD

torque numbers

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