|
1.8's are a tool for me for the most part although have run them in the past. In some cases build depending they work well and worthy. Others not and gain not worthy. Never had valvetrain issues with them. It like 14 apache mentioned in your application gains would more than likely be minimal. I'd seriously consider 741 cam in your build.
|
Originally Posted by getrdunn
(Post 4516219)
1.8's are a tool for me for the most part although have run them in the past. In some cases build depending they work well and worthy. Others not and gain not worthy. Never had valvetrain issues with them. It like 14 apache mentioned in your application gains would more than likely be minimal. I'd seriously consider 741 cam in your build.
|
You have a 4.25 stroke engine. 8.6:1 is low, but pretty much same thing mercury used on the 525efi, 502 mags,, etc. Those were 4 inch stroke. A 4.25 stroke will require more camshaft.
I personally think that cam is going to be small in that build. Mercs 525efi, had a 236/244 cam with fairly low static. They run great. If you wanna make some power, youll need a cam that doesnt die at 5000-5200rpm. I bought the comp ultra pro mag XD rockers last winter. So far so good. They look very beefy compared to the old cranes I had. I too ran cranes for years, had good luck, only 1 broke a trunnion. Then again, years back, we were running alot less spring psi, lot less rpm, milder cams, and so on. |
Originally Posted by MILD THUNDER
(Post 4516305)
You have a 4.25 stroke engine. 8.6:1 is low, but pretty much same thing mercury used on the 525efi, 502 mags,, etc. Those were 4 inch stroke. A 4.25 stroke will require more camshaft.
I personally think that cam is going to be small in that build. Mercs 525efi, had a 236/244 cam with fairly low static. They run great. If you wanna make some power, youll need a cam that doesnt die at 5000-5200rpm. I bought the comp ultra pro mag XD rockers last winter. So far so good. They look very beefy compared to the old cranes I had. I too ran cranes for years, had good luck, only 1 broke a trunnion. Then again, years back, we were running alot less spring psi, lot less rpm, milder cams, and so on. |
Im guessing you are running a flat top piston? If the block was 0 decked, with the eq heads, should be right about 9:1 off the top of my head with a .039 gasket
is that what you have ? |
Originally Posted by mggdoors
(Post 4516307)
Do those rockers clear the stock valve covers on gen vi
|
I too would stay with the 1.7 rockers. The 1820-16 have billet pushrod inserts, those are the ones i am running. The 1620-16, do not, and go for around 300-320 bucks if i recall , 100 bucks less than the 1820-16.
|
Originally Posted by mggdoors
(Post 4516307)
Do those rockers clear the stock valve covers on gen vi
|
Originally Posted by MILD THUNDER
(Post 4516308)
Im guessing you are running a flat top piston? If the block was 0 decked, with the eq heads, should be right about 9:1 off the top of my head with a .039 gasket
is that what you have ? |
Originally Posted by Baja Rooster
(Post 4516326)
The lock nuts did not clear my stock genvi valve covers. Close, a thicker cork gasket might of worked, but I bought the Hardin units instead.
|
| All times are GMT -5. The time now is 10:14 PM. |
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.