upgrading a 509
I'm looking for suggestions on upgrading a 509, It's going to need a bore due to minor watermarks in the cyl's, It's running a 256 blower w/superchiller and 6psi boost, 2 750 holley's built by nickerson, 525sc cam, flat tappet w/roller rockers, 502 bowtie heads rec. port, thinking about alum. heads and cam upgrade, but water ingestions seems to be a problem, It was disassembled for a blown head gasket between #5&7.
what is a good alum. head that will perform well but not break the bank, this boat gets run about 10 hours a year. Thanks Larry |
What type of headers are you using?
|
it's running the Imco version of gil's with std length riseres, wet exaust.
|
If you aren't already, make sure you use head studs when you put it back together. Also make sure to use Fel-pro MLS or similar head gskts. I have a Crane 731 roller cam for sale (Gen 6). It was on my 509's and with 8 lbs boost made 750 hp.
|
For an off the shelf cam, I'd use the 525EFI cam(Crane 741 on a 114 lob sep). Depending on if you change heads, you may want to go with a custom grind.
|
Originally Posted by Griff
(Post 2389836)
For an off the shelf cam, I'd use the 525EFI cam(Crane 741 on a 114 lob sep). Depending on if you change heads, you may want to go with a custom grind.
thanks for the replies. |
Originally Posted by Smitty
(Post 2389212)
If you aren't already, make sure you use head studs when you put it back together. Also make sure to use Fel-pro MLS or similar head gskts. I have a Crane 731 roller cam for sale (Gen 6). It was on my 509's and with 8 lbs boost made 750 hp.
thanks, larry |
Originally Posted by hoozeyurdaddy
(Post 2390116)
does arp make a stud kit, this is a mark 4, will a cam from a gen 6 work, does the cam have a lobe for the fuel pump, do you have the lifters also.
thanks, larry Pro Comp aluminum heads are nice for the money. $700 a pair with guides and seats or edelbrock marine complete are around $1500. |
Originally Posted by hoozeyurdaddy
(Post 2390107)
is the crane 741 a roller cam, and if I go with alum. heads, what is a good head for someone on a budget, is the 502 mag rotating assy, going to be OK for this engine.
thanks for the replies. |
AFR's 315's $2800.00 a set , But you will love the power.:D
|
All times are GMT -5. The time now is 04:46 AM. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.