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Topic: 1.7 on HO Conversion? (Read 4188 times) previous topic - next topic

1.7 on HO Conversion?

can you run E6 heads on a SO flat-top bottom end with a H.O. cam (this is the kicker) and 1.7 rollers rockers?

im getting in on of those moods(i get these from time to time but never have the time to do anything) where im seriously considering doing the swap and theres a week coming up where i can probably get off, so im seriously considering taking off and doing the swap then.

but my SO motor currently has 1.7 RR on there right now, and i'd rather not swap back to stamped steel 1.6's if i can get away with it. so will i have the clearance?
1988 Thunderbird sport
2004 Ford F150 Lariat
2008  Chevrolet Cobalt Sport
2007 Suzuki DR-Z400S dual sport/Supermoto
1988 Thunderbird LX - sold
1988 Mercury Cougar XR-7 with GST kit - gone

1.7 on HO Conversion?

Reply #1 –
I'd say yes with the stock H.O cam.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1.7 on HO Conversion?

Reply #2 –
Always check PTV, but you SHOULD be fine.
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

1.7 on HO Conversion?

Reply #3 –
Quote from: V8Demon;233778
Always check PTV, but you SHOULD be fine.



i know it should be checked, but im really trying to not pull the heads if i can. it'd just be easier to do it with the exhaust all bolted up and not having to buy new head gaskets, if im gonna go that far ill put E7's on, which im not gonna go outta my way to do. i cant afford to run into any problems with this, the less i take off, the less chance i break something.
1988 Thunderbird sport
2004 Ford F150 Lariat
2008  Chevrolet Cobalt Sport
2007 Suzuki DR-Z400S dual sport/Supermoto
1988 Thunderbird LX - sold
1988 Mercury Cougar XR-7 with GST kit - gone

1.7 on HO Conversion?

Reply #4 –
Quote
but im really trying to not pull the heads if i can


the second method here is how you'd want to do it then
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

1.7 on HO Conversion?

Reply #5 –
Don't bother checking ptv.
Guys are running bigger cams with 1.7s on so flatops.
Your lift with 1.7s on the stock ho cam will be .477, the e-cam is .499 and the stage 1 TF is .499/.510,guys have run these cams with no problems or ptv interference.
1WLDBRD and vinnetbird come to mind amongst many others.

1.7 on HO Conversion?

Reply #6 –
Yep,my E303 is really happy.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

1.7 on HO Conversion?

Reply #7 –
I ran 1.7s on a otherwise stock E6 headed '86 HO, no prob...

1.7 on HO Conversion?

Reply #8 –
@vinnietbird---so you are running the e-cam w/1.7's and E7's on SO flat tops?, no releifs?
That's .529 lift,,,,,,,,,that's cool
88 sport,TW heads, comp xe270hr, cobra u/Tmoss ported lower, 65 mm throttle body, under drives,smog delete,
1.7 roller rockers, cai, k&n, bbk adj regulator, 76mm Pro-m,all MSD ign. MSD dist,18° base timing, 3g alt.1 5/8 ceramic headers, 255lph walbro, 2.5" h-pipe, flowmasters, silverfox valvebody, 3.73 gear,
http://i216.photobucket.com/albums/cc154/flipnbird/DSCF0185.jpg ( RIP : ( )

1.7 on HO Conversion?

Reply #9 –
Vin, what springs do you run?
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

1.7 on HO Conversion?

Reply #10 –
No vin runs 1.6s on his.

1.7 on HO Conversion?

Reply #11 –
It's amazing how quickly people forget that the SO motor does NOT have flat top pistons...it's dished with no reliefs.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

1.7 on HO Conversion?

Reply #12 –
Quote from: dominator;233792
Don't bother checking ptv.
Guys are running bigger cams with 1.7s on so flatops.
Your lift with 1.7s on the stock ho cam will be .477, the e-cam is .499 and the stage 1 TF is .499/.510,guys have run these cams with no problems or ptv interference.
1WLDBRD and vinnetbird come to mind amongst many others.


sweet thats what i wanted to hear. i should be good to go then.

Quote from: Sick88Tbird;233901
It's amazing how quickly people forget that the SO motor does NOT have flat top pistons...it's dished with no reliefs.


sorry, its easier to say flat-top then dished with no reliefs. apologies all around.
1988 Thunderbird sport
2004 Ford F150 Lariat
2008  Chevrolet Cobalt Sport
2007 Suzuki DR-Z400S dual sport/Supermoto
1988 Thunderbird LX - sold
1988 Mercury Cougar XR-7 with GST kit - gone

1.7 on HO Conversion?

Reply #13 –
Quote from: Sick88Tbird;233901
It's amazing how quickly people forget that the SO motor does NOT have flat top pistons...it's dished with no reliefs.


They are flatter than HO pistons. ;)

It's become quite common over the years to say that here though; even though it is technically incorrect.

Quote
Your lift with 1.7s on the stock ho cam will be .477, the e-cam is .499 and the stage 1 TF is .499/.510,guys have run these cams with no problems or ptv interference.


Stop getting hung up on the max lift #'s.  They have almost zero effect on piston to valve clearance.  Where is the piston when the intake lobe is at full lift?  Where is it when the exhaust lobe is at full lift?
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

1.7 on HO Conversion?

Reply #14 –
Quote from: TurboCoupe50;233820
I ran 1.7s on a otherwise stock E6 headed '86 HO, no prob...


did you clay yours? if you got away with it, i should be able to also correct? idk how close im cutting it with the graphs stated in the previous post.
1988 Thunderbird sport
2004 Ford F150 Lariat
2008  Chevrolet Cobalt Sport
2007 Suzuki DR-Z400S dual sport/Supermoto
1988 Thunderbird LX - sold
1988 Mercury Cougar XR-7 with GST kit - gone