238/258 .586/.596 113+4 BTR nitrous cam
11-02-2014, 05:11 PM
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238/258 .586/.596 113+4 BTR nitrous cam Picked up some spare nitrous bottles, a NANO bottle and LS7 lifters from another forum member here in the great state of Texas and he was switching cams so I grabbed that as well as the price was right. It's a BTR 238/258 .586/.596 113+4 nitrous cam. We are moving from a bolt-on C5 LS1 to a H/C/I set-up and will most likely go with a stock bottom end (maybe add nice rods and pistons with good bolts) and BTR TFS 220 heads and a 102 intake. We are currently spraying 100 (made 130 to the wheels with the NANO) but may step up to 200 especially in we strengthen the bottom end.
What do you think about this cam? We don't drive the car on the street and currently it goes mid 11s NA on the stock LS1 @ 115 with 1.50 60' times with a Yank SS4000, 3.90 gears and 27" drag radials. Race weight is under 3200. How will it run NA as I'm sure it will like the nitrous? What do you think it will RPM to? I contacted BTR via email and with a phone call and they said it would work fine but didn't offer much more information (I know how busy they are and I was buying a cam from someone else and not them).
Any thoughts would be appreciated. Thanks!
Scott
What do you think about this cam? We don't drive the car on the street and currently it goes mid 11s NA on the stock LS1 @ 115 with 1.50 60' times with a Yank SS4000, 3.90 gears and 27" drag radials. Race weight is under 3200. How will it run NA as I'm sure it will like the nitrous? What do you think it will RPM to? I contacted BTR via email and with a phone call and they said it would work fine but didn't offer much more information (I know how busy they are and I was buying a cam from someone else and not them).
Any thoughts would be appreciated. Thanks!
Scott
11-03-2014, 10:43 PM
#3
That cam is way too big for a 5.7L engine and will not clear stock pistons on the exhaust side for sure.
If you want a "big" cam for a 5.7L engine look into the low 230's intake/low 240's exhaust. Almost 260* of duration in a 346 isn't gonna work or fit well in a street build.
Good luck.
If you want a "big" cam for a 5.7L engine look into the low 230's intake/low 240's exhaust. Almost 260* of duration in a 346 isn't gonna work or fit well in a street build.
Good luck.
11-04-2014, 01:01 PM
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Thanks guys. I don't have much invested in it and may sell it. Installing it without having to flycut wasn't what I was planning; having to clearance isn't an issue. I was just curious as to how it would work once properly installed and degreed. I know Stock Eliminator cars have TONS of duration with stock lift on small cubic inch engines and they run well and thought this might be similar.
Scott
Scott
11-04-2014, 04:50 PM
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Thanks guys. I don't have much invested in it and may sell it. Installing it without having to flycut wasn't what I was planning; having to clearance isn't an issue. I was just curious as to how it would work once properly installed and degreed. I know Stock Eliminator cars have TONS of duration with stock lift on small cubic inch engines and they run well and thought this might be similar.
Scott
Scott
11-04-2014, 06:55 PM
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Are you sure that 258 duration is correct? I'm no cam expert or guru that's why I had BTR spec a cam for my stock cube nitrous combo. They gave me an option between 2 cams 237/248 113+3 and 239/250 112+3. He said the 239/250 112+3 would make more power everywhere and work better with my Super Victor intake, so that's the one I went with. I should have the car to the track real soon with some results.