Which drag cam TRex, LG, FMS?
10-29-2004, 08:41 PM
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Sweet Cheeks
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Which drag cam TRex, LG, FMS? I need a cam that'll best suite a drag A4 without spinning to 6500+ RPM. Will the TREX do it, FMS Jeremy cam, Juggernaut cam? It's on stock torqued heads with a YPT4200 and a LIGHT car. What do you guys think?
10-29-2004, 09:44 PM
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Well knock the Trex off the list. You'll want to spin her higher then 6500 with that cam, the power doesn't end from what I've heard. I think its time to look into a custom ground cam. And for that, I'd definitely go to Allan @ FMS.
10-29-2004, 09:54 PM
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the RJ would prolly be your best bet out of those three. but the RJ was a custom one-off for distortion_69 that gained enough popularity that it was ground multiple times. i think that speaks for itself in support of the custom grind option 
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10-31-2004, 01:10 AM
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I think going smaller than the RJ wouldn't be detrimental for shifting at 6500.. FWIW: My cam peaked before 6500, but it felt best to me shifting at 6900-7000. However, it still hauled shifting at 6500 of course 
However, I don't have a copy of my dyno sheet anymore so I couldn't give you the rpm peak.
Out of that list I would pick the RJ. However, I think if your going to shift at 6500, it wouldn't be detrimental to go slightly smaller. I think the f14 is 232/234.. but you could might even go a little smaller.. I'd call Allan, Lou, Thunder or any of the creators of the cam and consult with them first.. Chances are they've seen it done b4.
Good Luck,
Josh
However, I don't have a copy of my dyno sheet anymore so I couldn't give you the rpm peak. Out of that list I would pick the RJ. However, I think if your going to shift at 6500, it wouldn't be detrimental to go slightly smaller. I think the f14 is 232/234.. but you could might even go a little smaller.. I'd call Allan, Lou, Thunder or any of the creators of the cam and consult with them first.. Chances are they've seen it done b4.
Good Luck,
Josh
I'm going to have to make some calls. Bigger isn't always better when you can't spin them I guess.
10-31-2004, 12:48 PM
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Why are you opposed to spinning them that high? I have rodbolts and turned mine to 7k for several months with no issues. The rod bolts were like $80.
Josh
Josh
10-31-2004, 03:30 PM
#11
ive been turning 7200 on stock rod bolts for over 6months, but the 01-02 cars are suposed to also have better rod bolts. changing rod bolts without rechecking bearing clearances is a bad idea imo for various reasons but im just saying that based upon other experiences.
10-31-2004, 04:18 PM
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FWIW: I've seen 3.. fixing to be 4 cars with ARP Rod bolts turning high rpms for extended miles.. Unless there is some deformation already, I don't think there will be any problems. Straight from the mouth of Allan Futral he has done far more than me with 0 problems, he said its pretty much proven that its not that big of a deal. Just my experience as well. My motor is smooth as anything, and I've put 4k-5k on it since the arp rod bolt install. Not saying your wrong or anything, as I definately don't like to argue. But its been done.. and reliably.
Peace,
Josh
Peace,
Josh
10-31-2004, 04:28 PM
#13
Originally Posted by distortion_69
FWIW: I've seen 3.. fixing to be 4 cars with ARP Rod bolts turning high rpms for extended miles.. Unless there is some deformation already, I don't think there will be any problems. Straight from the mouth of Allan Futral he has done far more than me with 0 problems, he said its pretty much proven that its not that big of a deal. Just my experience as well. My motor is smooth as anything, and I've put 4k-5k on it since the arp rod bolt install. Not saying your wrong or anything, as I definately don't like to argue. But its been done.. and reliably.
Peace,
Josh
Peace,
Josh
10-31-2004, 08:15 PM
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Master Shindo Say "just because cam that carries power to 7200 rpm and gets shifted at 6800 rpm doesn't mean that it isn't making more power through the rev range critical to drag racing (5000-6800 in this case) then cam that carries only to 6800 rpm". Master Shindo had long night last night so ignore his talk.
10-31-2004, 09:22 PM
#16
Originally Posted by SMOKIN01TA
ive been debating doing it, maby ill consider it.
10-31-2004, 09:31 PM
#17
Originally Posted by MUSTANGEATER
The only question I have about ARP rod bolts is that wouldn't putting them on the car cause you to need to resize the rods? I'm not even sure you can resize the stock ones? Maybe someone with more expertise will chime in.
10-31-2004, 09:43 PM
#18
Originally Posted by SMOKIN01TA
what would make you think that you would have to resize the rods, all you doing is removeing 2 bolts and puting 2 more back in basically identical just much stronger. all they do is hold the rod cap to the rod, not that big a deal to change, i just worried about changing clearances but it seams to not be that big a deal either.
For starters
https://ls1tech.com/forums/generation-iii-internal-engine/207679-question-about-rod-bolt-swap.html
