1.7 on HO Conversion?

Topic: 1.7 on HO Conversion? (Read 4189 times) previous topic - next topic

1.7 on HO Conversion?

Reply #15 – August 27, 2008, 11:31:20 PM

I put em on and went to the drag strip...

The valves are sunk so far into the combustion chamber on the E6s, they have no PV clearance issues...

1.7 on HO Conversion?

Reply #16 – August 28, 2008, 05:26:13 PM

Quote from: grutinator;233912

sorry, its easier to say flat-top then dished with no reliefs. apologies all around.

true, but it's even easier to just say "SO pistons"...lol

1.7 on HO Conversion?

Reply #17 – August 28, 2008, 07:17:11 PM

Although somewhat true don't confuse the man,he asked a simple question"will it work"answer yes.
We have no need to get into camshaft technical jargon here,most of us don't and usually only talk about max lift or duration.

1.7 on HO Conversion?

Reply #18 – August 28, 2008, 07:56:16 PM

Quote from: flipnbird;233821

@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

I sean this .It's wrong.

1.7 on HO Conversion?

Reply #19 – August 28, 2008, 07:58:35 PM

Quote from: kitzdnm;234022

I sean this .It's wrong.

Wow this is bigger than I thought.

1.7 on HO Conversion?

Reply #20 – August 28, 2008, 08:23:18 PM

you're thinking B-cam.....I did the same thing.....Looked it up and saw it was right. I get the b and e mixed up on occasion.

1.7 on HO Conversion?

Reply #21 – August 28, 2008, 09:48:59 PM

My engine originally came from an '87 Mark VII (new rings,bearings,timing chain,etc).It has forged flat top pistons.....FLAT LIKE KANSAS.The heads are ported E-7 heads with 1.6 roller rockers.The cam is an E303.The springs,I'm not sure.They were added by the machine shop and are beehive shaped.I really don't remember the brand.I have no PTV problems,the car pulls hard and will roast the tires without breaking a sweat.I'm happy.......for now.

1.7 on HO Conversion?

Reply #22 – August 28, 2008, 10:34:10 PM

Quote from: dominator;234020

Although somewhat true don't confuse the man,he asked a simple question"will it work"answer yes.
We have no need to get into camshaft technical jargon here,most of us don't and usually only talk about max lift or duration.

yea, thanks. i didnt think it'd get this technical. lol. buts good to know that it will work. but i always love learnig more about cams. i used to go by just max lift for a general idea. but since ive worked with jay allen for the cam on my T-bird and researching, theres SO MANY factors that make a cam what it is. so wherever i can learn more bout cam characteristics and thier function i try to absorb it. so this thread has helped.

1.7 on HO Conversion?

Reply #23 – August 28, 2008, 11:35:57 PM

Hey,better to have too much info than not enough.Besides,it never hurts to keep talking about these subjects even when they turn in to more than they were originally intended.A lot of times,people who are just watching learn from it as well.besides,it doesn't hurt anything.

1.7 on HO Conversion?

Reply #24 – August 29, 2008, 06:30:34 AM

Quote

Hey,better to have too much info than not enough.Besides,it never hurts to keep talking about these subjects even when they turn in to more than they were originally intended.A lot of times,people who are just watching learn from it as well.besides,it doesn't hurt anything.

Agreed.
Besides that a .400" lift cam with too much duration would need notched pistons before something like what Thunjerjet used in his car (high lift; relatively short duration)

Quote from: Dominator

We have no need to get into camshaft technical jargon here,most of us don't and usually only talk about max lift or duration.

Thread: Fox T-Bird/Cougar Forums > Technical > Engine Tech > 1.7 on HO Conversion?

Yup.....Its a TECHNICAL THREAD
Where else should we talk about technical info?

1.7 on HO Conversion?

Reply #25 – August 29, 2008, 10:44:08 AM

I have pretty much the exact set up as Vinnie.... I dont think they would clear with a 1.7 RR....

what Im wondering is.... Why are you bothering with the E6's to begin with? they are boat anchors... s em and go E7's

1.7 on HO Conversion?

Reply #26 – August 29, 2008, 12:54:09 PM

i recently had to do the feeler guage method but I did not need an additonal spring.

I just rotated an easy to get to piston at tdc.
felt around in there with a small dowel as i felt for the final TDC rotating the crank cw/ccw a little bit.
removed the spring set.
snapped on my magnetic dial indicator to a near by spring.
positioned the dial indicator over top of the valve which was sitting atop the piston.
zero'd out my dial indicator as the probe touched top of the valve stem.
lifted up the valve with my fingers and read the dial indicator reading.

I compared my readings to not using a spring but using a feeler guage cause i thought that would be a more applicable way for people without the dial indicator.

without a spring, just loosen the rocker fulcrum and then snug it finger tight against the push rod while holding up the rocker nose that would normally sit atop your valve stem. Basically just get the push rod snug to the lifter and the rocker.

Letting go of the rocker nose allows it to flop around a lot.
lift up on the valve by finger and insert the feeler guage in the gap between the valve stem and the rocker nose.

for the cost of a new set of valve covers, this can be done pretty easy.,,if the valve cover gaskets even need replaced. I alway silicone my gasket to the cover only just for this reason incase i need to get in there at the valves/rockers for timing issues ect.

1.7 on HO Conversion?

Reply #27 – August 29, 2008, 01:32:54 PM

Quote from: V8Demon;234085

Agreed.
Besides that a .400" lift cam with too much duration would need notched pistons before something like what Thunjerjet used in his car (high lift; relatively short duration)

True my cam is @.050 210*I/215*E with lift .533I/.533E. Clears my flat tops fine with a 1.6 rocker but I have valve notches. And yes I do have flat tops.

1.7 on HO Conversion?

Reply #28 – August 29, 2008, 06:34:10 PM

Quote from: thunderjet302;234117

True my cam is @.050 210*I/215*E with lift .533I/.533E. Clears my flat tops fine with a 1.6 rocker but I have valve notches. And yes I do have flat tops.

Actually you do NOT have flat tops...flat tops are just that...flat...no valve notches...go pull the heads off an '86 HO...now those are flat tops.

1.7 on HO Conversion?

Reply #29 – August 29, 2008, 07:30:58 PM

Quote from: 1WLD BRD;234097

what Im wondering is.... Why are you bothering with the E6's to begin with? they are boat anchors... s em and go E7's

And have another set of boat anchors that uses a different spark plug...

With 1.7s, underdrives and a 2 1/2" catback system, my otherwise stock '86 5 speed, 2.73 geared Stang, ran a best of 14.51 @ 95.5mph... That was on shiznitty tires and 2.2 short time, with traction it would have run 14.2s easy... It did start to "nose over" at about 5300 rpms, but I believe that was mostly shiznitty valve springs...