355 recipe for mid to high 12 1/4
#1
Junior Member
Thread Starter
Join Date: Feb 2013
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 iroc z
Engine: 305 tpi for now
Transmission: 700r4
Axle/Gears: 3:24
355 recipe for mid to high 12 1/4
355 speed pro flat tops
eagle crank 3.48
10.7:1
comp xe284h flat tappet
headman long tubes with purple hornies 3 inch collectors, side exit
edelbrock 750
vortec heads
air gap intake.
5 speed
4:11 10 bolt
going in 86 z.
295 50 16 M/T drag radials
shooting for 12.20-12.80
eagle crank 3.48
10.7:1
comp xe284h flat tappet
headman long tubes with purple hornies 3 inch collectors, side exit
edelbrock 750
vortec heads
air gap intake.
5 speed
4:11 10 bolt
going in 86 z.
295 50 16 M/T drag radials
shooting for 12.20-12.80
#2
Supreme Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
Join Date: Feb 2006
Location: Sanctuary state
Posts: 1,780
Likes: 0
Received 27 Likes
on
24 Posts
Car: 67 ******mobile
Engine: 385 Solid roller
Transmission: T-56
Axle/Gears: 4.11
Re: 355 recipe for mid to high 12 1/4
Maybe...thats a fair amount of cam in a 350
If theres any weak spots its the heads all you can do is try it go from there
If theres any weak spots its the heads all you can do is try it go from there
#3
Junior Member
Thread Starter
Join Date: Feb 2013
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 iroc z
Engine: 305 tpi for now
Transmission: 700r4
Axle/Gears: 3:24
Re: 355 recipe for mid to high 12 1/4
may go with the xe274h more torque than the 284. not much of a hp gain with the 284, just sounds nastier and last time i checked sound dosent win races. lol
#6
Re: 355 recipe for mid to high 12 1/4
These guys push the envelope with miss matched steel heads and then post about issues they are having.
![idiot](https://www.thirdgen.org/forums/images/smilies/idiot.gif)
Best recent bud to me(I do really mean that)is Skinny dealing with the same thing.
Ya know if it doesn't make sense,then it isn't sensible.
![nod](https://www.thirdgen.org/forums/images/smilies/nod.gif)
#7
Supreme Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
Re: 355 recipe for mid to high 12 1/4
You will probably have to work over the vortec heads a bit for that cam. A light port and polish should help them at max lift.
Trending Topics
#8
Re: 355 recipe for mid to high 12 1/4
True, everything is a package but alot of builds seem to get thrown together and then have to deal with it.
If you build high comp and need big cam, you better be willing to turn it to the rpm that cam works in, and better have the heads/intake to support it, or else you are wasting power.
Vortecs arent ideal to feed the big cam but the combo can work. You just end up with a flat hp curve across large rpm range and that requires you to turn rpm and add lots of gear ratio to use it.
If you build high comp and need big cam, you better be willing to turn it to the rpm that cam works in, and better have the heads/intake to support it, or else you are wasting power.
Vortecs arent ideal to feed the big cam but the combo can work. You just end up with a flat hp curve across large rpm range and that requires you to turn rpm and add lots of gear ratio to use it.
#12
Supreme Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
Re: 355 recipe for mid to high 12 1/4
I think the esxhaust port would be your first limitation. At minimum it would need a good porting and a 1.6 valve.
A better plan would be to look into bowtie 185 or maybe 225cc vortecs.
Maybe even one of the after market 185cc vortecs.
A better plan would be to look into bowtie 185 or maybe 225cc vortecs.
Maybe even one of the after market 185cc vortecs.
#13
Junior Member
Thread Starter
Join Date: Feb 2013
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 iroc z
Engine: 305 tpi for now
Transmission: 700r4
Axle/Gears: 3:24
#14
Re: 355 recipe for mid to high 12 1/4
You do know the Eagle's are tons less than a GM forged steel which in the long run and updates you currently haven't planned on,the GM steel would handle easily.
Note-no comment or advice on good aftermarket cranks.Eagle doesn't have a good track record.
Note-no comment or advice on good aftermarket cranks.Eagle doesn't have a good track record.
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
12-10-2019 07:07 PM
codeysabatini
Engine/Drivetrain/Suspension Parts for Sale
5
11-10-2015 04:07 PM