Anybody interested in a J30A4 Cam Swap?
04-04-2003, 10:06 AM
#1
Racer
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Anybody interested in a J30A4 Cam Swap?
No?
Well maybe you ought to be.
A member at the AV6 site bought the FSM and posted up the cam specs for the 03+ Accord V6's new J30A4 engine. I wrote up a little comparison and noticed that the J30A4 cams are MORE agressive on the non-VTEC profiles for the intake valves than the J32A2 is. This might help you all motor guys get a little more low/mid-range grunt, and maybe even help whoever has a turbo spool up a little quicker.
Here is the meat of it...
I did a full writeup for the guys at the AV6 site, but it's mostly tailored for the 98-02 AV6 people (mostly younger, not as knowledgeable) as more of an educational style thread. But you're still more than welcomed to check it out if you want, but the above gives you everything you need to know.
AccordV6.com: Cam Spec Comparison: J30A1 vs J30A4 vs J32A1 vs J32A2
EDIT: The J32A2 exhaust profile actually has slightly more lift than the J30A4, probably to accommodate the slight bump in diplacement. Sorry for the typo.
Cheers
Well maybe you ought to be.
A member at the AV6 site bought the FSM and posted up the cam specs for the 03+ Accord V6's new J30A4 engine. I wrote up a little comparison and noticed that the J30A4 cams are MORE agressive on the non-VTEC profiles for the intake valves than the J32A2 is. This might help you all motor guys get a little more low/mid-range grunt, and maybe even help whoever has a turbo spool up a little quicker.
Here is the meat of it...
Code:
(lift in mm)
Engine: Primary, VTEC, Secondary, Exhaust
J30A1: 34.615, 36.210, 31.188, 36.076
J32A1: 34.737, 36.445, 34.919, 36.326
J32A2: 34.737, 36.445, 34.919, 36.389
J30A4: 35.041, 36.445, 35.284, 36.326
AccordV6.com: Cam Spec Comparison: J30A1 vs J30A4 vs J32A1 vs J32A2
EDIT: The J32A2 exhaust profile actually has slightly more lift than the J30A4, probably to accommodate the slight bump in diplacement. Sorry for the typo.
Cheers
04-04-2003, 11:22 AM
#3
teh Senior Instigator
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how much are they going for
Nashua, it all really depends on your setup now too.
thanks for all the info man!
Nashua, it all really depends on your setup now too.
thanks for all the info man!
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04-04-2003, 01:05 PM
#10
Senior Moderator
good info
04-04-2003, 10:21 PM
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Suzuka Master
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I have not read up about the specs on the J30A4 to determine if the same displacement is kept by the same bore and stroke?? Or did they change one and the other and keep the same filling capacity??
What are bore and stroke numbers for the J30A4??
Also, are the overlap numbers available??
Now that I am running under boost less overlap would be preferred. Nevertheless, this is interesting and might prove valuable.
What are bore and stroke numbers for the J30A4??
Also, are the overlap numbers available??
Now that I am running under boost less overlap would be preferred. Nevertheless, this is interesting and might prove valuable.
04-05-2003, 10:00 AM
#18
Cost Drivers!!!!
Originally posted by scalbert
I have not read up about the specs on the J30A4 to determine if the same displacement is kept by the same bore and stroke?? Or did they change one and the other and keep the same filling capacity??
What are bore and stroke numbers for the J30A4??
Also, are the overlap numbers available??
Now that I am running under boost less overlap would be preferred. Nevertheless, this is interesting and might prove valuable.
I have not read up about the specs on the J30A4 to determine if the same displacement is kept by the same bore and stroke?? Or did they change one and the other and keep the same filling capacity??
What are bore and stroke numbers for the J30A4??
Also, are the overlap numbers available??
Now that I am running under boost less overlap would be preferred. Nevertheless, this is interesting and might prove valuable.
86.0 x 86.0 j30a4
3.50 in x 3.39 in (89 mm x 86 mm) j32a2
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