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JordanWhiteMusic.com
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4,699 Posts
Makes like 3-4 more HP I think. Not really worth to get your JWT ECU re-programmed unless your really hung up on it.

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Jordan
1998 Sentra SE -
Hotshot G3 Header, Hotshot CAI, JWT s4 Cams, Timing @ 19, KYB AGXs, Eibach Sportlines, Courtesy F&R STB's, ES Mounts, MOMO Shifter

15.454 @ 88mph at Englishtown, NJ - stock cams
 

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SR20GE P11
Joined
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433 Posts
I just purchased my JWT/ECU AND S3/CAMS through
STILLEN, I spoke with Jim Wolf and he advised that I would not need to reprogram my ECU which I purchased just one month prior to receiving my cams. I have a question How old is your JWT ECU. Like I have mentioned here on the forum that I was having my cams installed tomorrow and I would hate to think that there is anything else that has to be done to my ECU. I have only heard of reprograming needed for the S4cam. I would definitely say give Jim Wolf a call on this one, Let me know what happens.

Nigel

[This message has been edited by paradyme (edited 12-15-2000).]
 

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former pulsar car whore
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1,397 Posts
I pretty sure the S4 cams are dyno proven 12hp. The S3 cams are very similar to the S4's so one would expect the hp gains to also be about the same.
 

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www.motorists.org
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3,047 Posts
Well the S4s do give a bit more hp, especially top end. They wouldn't sell both of them if they weren't the same


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Ben98SentraSE
98 Sentra SE TURBO
 

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SR20GE P11
Joined
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433 Posts
Jim Wolf says that you will need Ecu reprograming with S4 Cams and valve spring adjustment. S4's and S3's are not the same One is for street. The S3, And one is for racing. The S4, Riding up and down a boulavard somewhere in America looking for someone to chase to the red light and a possible reckless driving ticket is not racing. Give Jim a call, He answers the phone. No need to debate.
 

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former pulsar car whore
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1,397 Posts
Ben that's why I said they were similar.
 

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former pulsar car whore
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1,397 Posts
Um, Paradyme. I believe both the S3 and S4 cams are street cams. The S4 cams do not require valve springs. My friend has them on his car and does not have valve springs. The C series cams are the race cams. I believe only the C1 and C2 cams are out now. I think the C3 and definitely the C4 cams will require valve springs. I've been right there when Craig Damashi from Acceleration Pluss in Connecticut, has called Jim Wolf and listened intently to every word.
 

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SR20GE P11
Joined
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433 Posts
OK OK, I stand corrected, regarding the race cam. I have heard of the two other cams you mentioned(c1 and c2) and you are indeed correct. The use of cams on stock engines do not require the JWT ECU, meaning your car will operate, and operate poorly especially with S4 cam, which has even greater loping idle. SE-R's have been known to have trouble with S3 cams if there was no JWT ECU installed. Your car will operate poorly in cold weather and will tend to cut off unexpectedly, so I definitely suggest the ECU for use with S4 cams I was told by Jim Wolf that their is no need to have your Ecu reprogramed with S3 cams I'm not sure about the S4cam, but I wouldn't be surprised if you did. The S3cam and the S4 is not the same............OUT!
NIGEL
95/G20t/auto
STILLEN header,intake, JWT ecu(timing set at 15 degrees),and cams, GREDDY/TRUST exhaust, repainted all black, 99G20/Stock 15inch rims
 

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JordanWhiteMusic.com
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4,699 Posts
Neither of the S cams need any other internal work. I have them.

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Jordan
1998 Sentra SE -
Hotshot G3 Header, Hotshot CAI, JWT s4 Cams, Timing @ 19, KYB AGXs, Eibach Sportlines, Courtesy F&R STB's, ES Mounts, MOMO Shifter

15.454 @ 88mph at Englishtown, NJ - stock cams
 

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former pulsar car whore
Joined
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1,397 Posts
You don't have to have the ECU reprogrammed for the S4 cams. My friend is running them now. You are correct about running them without the ECU. With proper tuning however it is possible to run them without it. To experience them to the fullest you need the ECU to eliminate the stock rev limiter. The cams are not the same but very similar just as I mentioned before.
 
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