How Hard To Hit It
07-04-2015, 09:52 PM
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How Hard To Hit It Ok, so I've been spraying my stock bottom end LS1 in my drag boat with a 170 shot forever. It's been fun, but it finally spun a bearing two weekends ago. I've been going over and reading tons of info on the best stroker motor to go with. The plan right now is to build an LS3 416/418 stroker and put my current LS1 AFR Mongoose 210 heads on it, and spray the crap out of it. I run a Victor Jr and a Demon 850 carb.
Will this handle a 300-350 shot spinning at 7,000 rpm? Cam now is an LG G5X3.
Will this handle a 300-350 shot spinning at 7,000 rpm? Cam now is an LG G5X3.
Last edited by Blazeracer; 07-04-2015 at 10:13 PM.
07-06-2015, 04:23 PM
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Also, my have enough cheddar to put a 427 kit in an LSX block. That should be about bullet proof, maybe??
Last edited by Blazeracer; 07-06-2015 at 04:47 PM.
07-06-2015, 04:49 PM
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Anyone ever run an LSX block with a 4.000" stroke and 4.125" nitrous pistons? That should spin fast and take a big shot.
Prolly set er up with them new Mamo 235 nitrous heads and custom ground nitrous cam.
Prolly set er up with them new Mamo 235 nitrous heads and custom ground nitrous cam.
07-06-2015, 07:46 PM
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PRC aftermarket 255's??? They're supposed to be all out beasts for max effort.
The only deal with the cathedral ports is that I already have the rockers, intake, pushrods and all associated crap I would need now on my current AFR 1510 heads. They are absolutely perfect on a 5.7 liter, but will probably fall short on a big bore motor.
The only deal with the cathedral ports is that I already have the rockers, intake, pushrods and all associated crap I would need now on my current AFR 1510 heads. They are absolutely perfect on a 5.7 liter, but will probably fall short on a big bore motor.
07-06-2015, 08:00 PM
#7
PRC aftermarket 255's??? They're supposed to be all out beasts for max effort.
The only deal with the cathedral ports is that I already have the rockers, intake, pushrods and all associated crap I would need now on my current AFR 1510 heads. They are absolutely perfect on a 5.7 liter, but will probably fall short on a big bore motor.
The only deal with the cathedral ports is that I already have the rockers, intake, pushrods and all associated crap I would need now on my current AFR 1510 heads. They are absolutely perfect on a 5.7 liter, but will probably fall short on a big bore motor.
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07-06-2015, 08:18 PM
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That's why AFR. All the castings start off the same. All my current AFR crap would work. I know in Hotrod's head challenge, AFR 245's had most peak power, but they were all just a tick away from each other. Talking about AFR, TFS, Mast and PRC. None of the 245's are bad.
We'll build a big bore short stroke 427 foundation, then check my wallet. LOL
We'll build a big bore short stroke 427 foundation, then check my wallet. LOL
Last edited by Blazeracer; 07-06-2015 at 08:53 PM.
07-08-2015, 10:14 AM
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When you're ready for a puck, give me call and I'll make it happen for you! I can also give you some ideas where to send the intake to get ported and have the runners flow-matched so you can get the most out of the puck that you can get-
07-08-2015, 10:20 AM
#11
Tony Mamo is a knowledgeable guy when it comes to powerful driveable street engines, but he's not the guy I would pick to spec out my drag race nitrous set up. His philosophy on cam and engine specs isn't what I would choose in your situation. Like blk said, I have never seen anything big power nitrous come out of his or the AFR camp on the LS platform. Thats not to say that he doesn't make power in some applications, but I wouldn't consider this one his forte. Do some research on powerful nitrous cathedral port combos and see what you come up with. I know which heads get my vote, TFS 245 with nitrous exhaust port.
07-12-2015, 04:10 PM
#12
If you have a budget and ant to use your current heads I would think about using an ls2 or 6.0 and build a 3.9 stroke 4 inch bore motor, heads won't feed much more than that, and an3.9 stroke will let you put a lot better nitrous ring package piston in.
Fwiw if you take those castings and send them to someone to have the ports done over they will make decent power, lots of better options... But depending on what your budget is etc is going to dictate what you do.
Fwiw if you take those castings and send them to someone to have the ports done over they will make decent power, lots of better options... But depending on what your budget is etc is going to dictate what you do.
07-12-2015, 04:49 PM
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Ok, now leaning toward an LSx block with a 4.125 bore and 4.000 stroke making it a 427, and running PRC LS7 heads. THis will totally bust the budget and probably **** off the wife, but it'll be a screamer that will see 7,000 rpm often.
Do Gen III rockers wtih the trunion upgrade work on LS7 heads?
OR - Buy a 4.185 finished block with a 4 inch stroke and make a 440.
Do Gen III rockers wtih the trunion upgrade work on LS7 heads?
OR - Buy a 4.185 finished block with a 4 inch stroke and make a 440.
Last edited by Blazeracer; 07-12-2015 at 06:56 PM.
