Help. JE pistons set needed now 4.535 bore Flat top
06-24-2005, 07:32 PM
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Help. JE pistons set needed now 4.535 bore Flat top
I need a set of JE pistons for this combination.
BBC ci 540, short deck
Bore-4.535
Type-Flat top
Rod-6.385
If anyone has on the shelf please let me know. JE needs 4 weeks to supply them
Ted
BBC ci 540, short deck
Bore-4.535
Type-Flat top
Rod-6.385
If anyone has on the shelf please let me know. JE needs 4 weeks to supply them
Ted
06-24-2005, 11:14 PM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
Originally Posted by jspeeddemon
Call competition products at 920 233 2023 I believe they said they have 7 sets on the shelf.
I have a set of 4.530 on hand but the twin engine is at 4.535. Given that these are blown 1200 hp I thought that it might be wise to match the size as the difference in cubic inches relates to about twenty horse or a bit less. Does anyone have an opinion on whether I need to try and match up this closely?
Ted
06-25-2005, 10:06 AM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
I would me more concerned with piston to wall clearence
rather then HP difference. I rebuilt one of my engines last
year. Punching it up to 4.530 while the other is still at
4.5 flat. 10lbs boost intercooled. no noticible difference while operating.
My finished bore sizes are 4.530 piston size is 4.522
4.500 on other engine with 4.492 piston size.
I run Ross Blower pistons with a overall average of
8 to 10 thousands per hole.
I beleave JE allows for tighter clearance it depends on the
Alumminum used and silicon in it.
Get a set which will allow the proper (JE recomended)
piston to wall clearence.
As far as difference in the boat you wont even feel it.
Gerry
rather then HP difference. I rebuilt one of my engines last
year. Punching it up to 4.530 while the other is still at
4.5 flat. 10lbs boost intercooled. no noticible difference while operating.
My finished bore sizes are 4.530 piston size is 4.522
4.500 on other engine with 4.492 piston size.
I run Ross Blower pistons with a overall average of
8 to 10 thousands per hole.
I beleave JE allows for tighter clearance it depends on the
Alumminum used and silicon in it.
Get a set which will allow the proper (JE recomended)
piston to wall clearence.
As far as difference in the boat you wont even feel it.
Gerry
06-25-2005, 12:21 PM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
Originally Posted by caveman
I would me more concerned with piston to wall clearence
rather then HP difference. I rebuilt one of my engines last
year. Punching it up to 4.530 while the other is still at
4.5 flat. 10lbs boost intercooled. no noticible difference while operating.
My finished bore sizes are 4.530 piston size is 4.522
4.500 on other engine with 4.492 piston size.
I run Ross Blower pistons with a overall average of
8 to 10 thousands per hole.
I beleave JE allows for tighter clearance it depends on the
Alumminum used and silicon in it.
Get a set which will allow the proper (JE recomended)
piston to wall clearence.
As far as difference in the boat you wont even feel it.
Gerry
rather then HP difference. I rebuilt one of my engines last
year. Punching it up to 4.530 while the other is still at
4.5 flat. 10lbs boost intercooled. no noticible difference while operating.
My finished bore sizes are 4.530 piston size is 4.522
4.500 on other engine with 4.492 piston size.
I run Ross Blower pistons with a overall average of
8 to 10 thousands per hole.
I beleave JE allows for tighter clearance it depends on the
Alumminum used and silicon in it.
Get a set which will allow the proper (JE recomended)
piston to wall clearence.
As far as difference in the boat you wont even feel it.
Gerry
thank you for the info on power. you had thirty thou diff. and didnt feel it or see it on the tach I presume, I sure wont see five thou dif. then
As far as clearances go, ileave it to my builder. I have run JE in blower engines for years with no trouble, blow by or scuffing. They use a low silicon alloy these days, unlike the past and dont swell much once warm.
I will live with what I have for this overhaul.
Ted
06-25-2005, 02:26 PM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
Ted you will be Fine for Sure!
Now get those bad boys together.
Now get those bad boys together.
06-26-2005, 12:45 PM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
Originally Posted by caveman
Ted you will be Fine for Sure!
Now get those bad boys together.
Now get those bad boys together.
This friday they should be ready to bolt on the new Quad rotor's.
Have a great summer.
06-26-2005, 11:44 PM
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Re: Help. JE pistons set needed now 4.535 bore Flat top
Originally Posted by SQUISHFACTOR
JE offers an expedite service for custom builders you can have a set of pistons in 3 working days for an additional 50% 5 days for 40% or 7 days for 25% If you need any help getting them let me know Iam direct with JE
I will talk to my engine guys tomorrow. I called JE and they didnt tell me about that. Do you think I have to worry about 5 thou? It doesnt seem to matter to the other guys on here who have run sligtly different bores. I wouldnt normaly run an odd bore but The pistons were already ordered and in my shop.
Thanks
