305 engine ?
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Potential obstructions that would interfere with the underside of the
Crossfire intake and prevent it from settling fully int the intake valley.
The second photo shows a valley configured for a roller cam with the
retainer spider mounted on risers cast in the block. If the underside
of the Crossfire has a heat shield or is cast in such a way as to require
the full depth of a non-roller block, then it may not fully seat in a
roller block.
I am aware that '85 Trans Ams did not ship with 305's configured for
roller tappets.
.
Crossfire intake and prevent it from settling fully int the intake valley.
The second photo shows a valley configured for a roller cam with the
retainer spider mounted on risers cast in the block. If the underside
of the Crossfire has a heat shield or is cast in such a way as to require
the full depth of a non-roller block, then it may not fully seat in a
roller block.
I am aware that '85 Trans Ams did not ship with 305's configured for
roller tappets.
.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 32
From: The Top of Utah
Originally Posted by Slalom4me
If the underside of the Crossfire has a heat shield or is cast in such a way as to require the full depth of a non-roller block, then it may not fully seat in a roller block.
RACE ON!!!
Advanced
Joined: Aug 2006
Posts: 50
Likes: 0
if you don't figure it out take some good pics and im sure we can get you an answer.dumb question but you do have the valvecovers off don't you, ive seen this causing the same problem.if you can get the ports sitting flat, silicone the front and back no matter what the gap.
Le Mans Master
Joined: Jan 2001
Posts: 9,257
Likes: 4
From: NJ
The 305 is a boat anchor please don't keep it in a vette. If you need it to go around in, cool. True the 305 is essentialy the same but it was built for smog not power. I can't recall the entire conversation i had with a friend but the jist was: if you bored it and re stroked it you could have a 327 engine and it could make 300 or so horse. My retorte was ok but if you did that to a 350 you could have 400+ horse, which would you rather do?
Thread Starter
Intermediate
Joined: Nov 2006
Posts: 48
Likes: 0
It looks like the first block.
I know it sound crazy to some of you but im telling you the truth this thing is not sitting flat at all.It looks to me like i would need the intake machined down in the front and the rear for this to work.
I going to work on it this weekend and ill take some pics.Like i was saying maybe Im not seeing something but ill look it over.
I know it sound crazy to some of you but im telling you the truth this thing is not sitting flat at all.It looks to me like i would need the intake machined down in the front and the rear for this to work.
I going to work on it this weekend and ill take some pics.Like i was saying maybe Im not seeing something but ill look it over.
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Pro
Joined: Feb 2005
Posts: 560
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From: Hamilton New Jersey
Please take pics of the engine, mainly the intake ports on the heads and the lifter valley, and the bottom of the intake, there has to be some obstruction beause like everyone else said it should bolt right up unless the manifold is horribly warped or something.
Quote:
Originally Posted by coupeguy2001
The cam might have to be changed on the 305 due to it being TPI motor, and going into a throttle body car.
Quote:
Leave the cam alone. It is well suited for what you are doing.
Do you know what 305 you have? Its either a LG4, which was the low performance 305 with a small cam and a 4 barrel, the L69 which was the "High Output" 305 with a reasonable cam and a 4 barrel, or the LB9 which was the TPI with the same cam as the L69. The specs for the "HO" cam were .403 int .415 exh and 202/206 duration w/ 114.5 lsa... the LG4 cam was total junk but I don't recall the specs..
Quote:
Originally Posted by coupeguy2001
The cam might have to be changed on the 305 due to it being TPI motor, and going into a throttle body car.
Quote:
Leave the cam alone. It is well suited for what you are doing.
Do you know what 305 you have? Its either a LG4, which was the low performance 305 with a small cam and a 4 barrel, the L69 which was the "High Output" 305 with a reasonable cam and a 4 barrel, or the LB9 which was the TPI with the same cam as the L69. The specs for the "HO" cam were .403 int .415 exh and 202/206 duration w/ 114.5 lsa... the LG4 cam was total junk but I don't recall the specs..
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
The gap is the size of a nickel laying flat. The gap is at the back and the front of the block
You should then see about a 1/4" gap between the bottom of the intake and the front & rear lands of the block. These locations are where the RTV will go to deal the base.
On the 305, does the valley below the intake manifold look like this?
Race Director
Joined: Dec 2002
Posts: 13,345
Likes: 230
From: SCMR Rat Pack'r Charter Member..Great Bend KS
larry
code5coupe
___________
I ain't easily impressed....
Wait till you can do a 350 or bigger
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Thread Starter
Intermediate
Joined: Nov 2006
Posts: 48
Likes: 0
Well it fits just fine.One of the intake bolts was holding it up.
It was the end of the day and i just wanted to get home.
I want to thamk all of you for the help.This site is a great.
Anyhow i should have the engine in this weekend so I'll let you know how I make out.
It was the end of the day and i just wanted to get home.
I want to thamk all of you for the help.This site is a great.
Anyhow i should have the engine in this weekend so I'll let you know how I make out.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
intake
Iffff you remember, I mentioned that the front and the back of the block might hit the manifold............ the head intake gaskets will be required to glue two intake manifold gaskets together. I have done it before. It is tricky to get just right. but it fills in the gaps without machining the manifold. If you are only using it for 4 months, what the heck, give it a try