Preparing for SuperChargers
01-14-2013, 10:12 AM
#11
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Jason, are you keeping those pistons? If so I'd keep the boost around 3.5-4.5 lb and good fuel. Even with a measly 3-4lbs of boost, I wouldn't be surprised to see easy 100-125hp gain over what you have . You can do more with some meth injection or race fuel. I think your cam selection will play a big factor in what you can do on the pump.
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01-14-2013, 10:55 AM
#13
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I plan on using my existing pistons. I called JE and talked to one of their engineers. He said the small dome pistons I have I could cut the domes off to the desired cc I wanted because they were solid dome pistons. He also told me 2.68g/cc if I cut the domes off. If they were hollow dome pistons he gave me his recommended minimum dome thicknesses dimensions N/A vs boosted.
Did you ask that because they are not flat tops or because of the compression ratio? I am going get the CR down. I don't want to run more than 5psi.
Last edited by Rookie; 01-14-2013 at 10:57 AM.
01-14-2013, 11:40 AM
#15
I started tearing down my 600HP 454's. I have 4 seasons on these engines and I run them up to 6300RPM quite regularly. I have always referred to them as my high strung 454's but all in all they have been great, mild mannered engines. They idle at 600RPM with 35* locked out timing.
This winter I am going to pull my solid roller cams and put in some blower friendly cams. As of now they are 9.6:1, with SRP small dome pistons that are 0.014" in the hole, Valako Pro1 heads, Isky Solid lifters, Crane HI-6M ignitions and Barry Grant (Holley) 750's. I have a pair of B&M 250's that I plan on putting on the top of these mills.
I plan on dynoing N/A with the new cams and then with the blower on. I will probably first run them in the boat without the blowers and then add them later in the season.
This winter I am going to pull my solid roller cams and put in some blower friendly cams. As of now they are 9.6:1, with SRP small dome pistons that are 0.014" in the hole, Valako Pro1 heads, Isky Solid lifters, Crane HI-6M ignitions and Barry Grant (Holley) 750's. I have a pair of B&M 250's that I plan on putting on the top of these mills.
I plan on dynoing N/A with the new cams and then with the blower on. I will probably first run them in the boat without the blowers and then add them later in the season.
01-14-2013, 11:51 AM
#16
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I flycut my pistons to get the static cr to 9.25 and run 6# boost. I shoot for a dynamic cr of 8.0-8.1 with my crane 731 cam straight up.
Did anyone ever make a -2 trs lower? That would help you immensley on the top end.
FWIW, I run 5300-5400rpm 1:5ratio drives w 32p bravos to get my best speeds. You might be right about lowering your power band to gain top end. I think the longer strakes will help as well since your CG is so far back with the trs setup.
Did anyone ever make a -2 trs lower? That would help you immensley on the top end.
FWIW, I run 5300-5400rpm 1:5ratio drives w 32p bravos to get my best speeds. You might be right about lowering your power band to gain top end. I think the longer strakes will help as well since your CG is so far back with the trs setup.
Last edited by blue thunder; 01-14-2013 at 11:56 AM.
01-14-2013, 12:31 PM
#17
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My AFR's are 11.8-12. I have bungs in all 4 tails. I was thinking that the discoloration was actually due to the little bit of reversion I have. I have over a 1 mile idle back to the dock. I had a little bit of water in the manifolds. It's hard to believe that you can pull water 3' back through dry to the tip TRS tail pipes. This should also be corrected with the new cams. Note cams on a 108* may cause reversion. lol
01-14-2013, 08:18 PM
#20
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Looks like there is quite a bit of stock.
http://www.jepistons.com/Catalogs/SR...dome_open.aspx
Last edited by Rookie; 01-14-2013 at 08:20 PM.
