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xlt4wd90 12-15-2018 05:39 PM

For stock engines, the change is small enough that the stock computer should not have any problems. Its effects are greater if you have enhanced other parts of your intake.

I've been running a set in my 87 GT (SD computer) for a few years, and I've had no problems. The engine has a larger throttle body and 1.5" aftermarket headers, but is otherwise stock. I will say that I noticed a drop in power when I switched back to the stock throttle body. I don't drag in the streets, but there is an on-ramp I'm very familiar with, and it's definitely taking me longer to get up to speed with the smaller TB. So my feeling is the 1.7:1 rockers by themselves have very small effects on power.

baddad457 12-15-2018 09:17 PM

Ford found a 15 hp increase when they used the full roller 1.7's on the Cobra 5.0. Some came from the friction reduction in the switch to the roller trunnion, some from the increased valve lift (.030 at the valve) and the stiffer rockers (no deflection). They also lowered the oil temperatures. I've used a set now on 5 different engines (same set) that had over 100K miles on them. They seem to last forever.

schoo 12-16-2018 08:49 AM

This is good information guys it confirmed my ideas on this build I’ll post my material list when I get my heads it’ll probably be similar to Dave’s list. If I start going in the wrong direction please let me know

schoo 12-23-2018 01:28 PM

Ok I went to cam quest and checked out what they recommend I’m still scratching my head on this but they give a component list to help/spend at there site. They say EFI compatible I hope that is SD? Alright the numbers

1. 35-308-8

2. 35-320-8 not sure if SD works here or mas air

3. 35-512-8
So let’s have some input them they are all the same $$

schoo 12-26-2018 07:11 PM

HHope everyone had great Christmas, I made a material list so be nice

Heads. Gt40
comp cam. 35-512-8
comp cam. Timing 2120
trick Flow roller lifter. Tfs. 21400004
crane cam roller rocker 44746-16
trick flow springs. Tfs2500010
mahle. Rings. 4197cp
Hope this works

baddad457 12-26-2018 09:01 PM


Originally Posted by schoo (Post 18382376)
HHope everyone had great Christmas, I made a material list so be nice

Heads. Gt40
comp cam. 35-512-8
comp cam. Timing 2120
trick Flow roller lifter. Tfs. 21400004
crane cam roller rocker 44746-16
trick flow springs. Tfs2500010
mahle. Rings. 4197cp
Hope this works

I would use Comp's springs instead of Trick Flows. Also a plain jane Cloyes True Roller timing set for a late model roller 5.0 will save you money I'd bet. That's what I put in my 331 14 years ago ($25 at O'Reillys) still on the job too.

schoo 12-27-2018 07:52 AM


Originally Posted by baddad457 (Post 18382550)
I would use Comp's springs instead of Trick Flows. Also a plain jane Cloyes True Roller timing set for a late model roller 5.0 will save you money I'd bet. That's what I put in my 331 14 years ago ($25 at O'Reillys) still on the job too.

thanks for feed back, timing set $39 itís not that bad. Tell why comp cam springs over trick flow the price was quite a lot different like $60

baddad457 12-27-2018 08:29 AM


Originally Posted by schoo (Post 18383037)

thanks for feed back, timing set $39 itís not that bad. Tell why comp cam springs over trick flow the price was quite a lot different like $60

That's not a bad price then. I recommended the springs because the rates may be different. Just make sure they're close in specs if you're going to go with them.

schoo 12-27-2018 08:57 AM


Originally Posted by baddad457 (Post 18383079)
That's not a bad price then. I recommended the springs because the rates may be different. Just make sure they're close in specs if you're going to go with them.

thanks bad looking into it

schoo 12-27-2018 10:32 AM

If I replace the rod bolts do I need to hone the journal

fordman75 12-27-2018 01:20 PM


Originally Posted by schoo (Post 18383341)
If I replace the rod bolts do I need to hone the journal

Have the rods resized on the big end when replacing bolts. On the crank journals, inspect for any nicks, other damage, hot spots, etc. If they look good just mic. them in a few spots to make sure they are round and within specs.

schoo 12-27-2018 01:26 PM

I miss stated but thank you

schoo 12-27-2018 01:32 PM


Originally Posted by schoo (Post 18328008)

The converter was tight against the flex plate you can see the bolts rubbing is that the normal
https://cimg9.ibsrv.net/gimg/www.for...df8dc39cf.jpeg
It was a tight fit taking it out Tran dip stick was Just in the way

talked to the transmission guy today he saying that itís the flex plate that 200k itís all through flexing and I need a new one

schoo 12-28-2018 09:42 AM


Originally Posted by baddad457 (Post 18383079)
That's not a bad price then. I recommended the springs because the rates may be different. Just make sure they're close in specs if you're going to go with them.

ok checked with summit tech he said what comp cam did was move a new spring (beehive)into there recommended use they used to use a very similar spring to what I will use the trick flow

schoo 12-30-2018 08:57 AM

Some body on here said I will need a different distributor drive gear if I change cams(comp cam#35-512-8)is this true and if so have you got a part#


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