Safe to run E-Cam with 1.7's?

Kdubslugga

Active Member

Jun 7, 2003

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38

Akron, OH

Aug 28, 2006

#1

• Aug 28, 2006

• #1

Ive already done the search but couldnt come up with anything good. I have 1.7 rockers right now and Im doing heads and a cam this winter. I have a set of Edelbrock Performer Heads 1.90/1.60, and I love the sound of the E-cam. Ive heard the performance is pretty good to. I realize its not the best performing cam on the market thats not what im after, I just wanna know if the piston to valve clearance will be to close. I know the e-cam has .498 of lift and with the 1.7 rockers it would bump it up to .528. So is it safe??

 

Mr. Rustypwnz

Advanced Member

Jun 1, 2005

1,761

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indianapolis/ valdosta ga

Aug 28, 2006

#2

• Aug 28, 2006

• #2

heck I run it on my car they are actually 1.72's so it is about 530 lift, and with the stock heads I dont have a prob, you shouldnt either.

 

wythors

Get off my lawn!!!

Founding Member

May 17, 2000

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C Addle

Aug 28, 2006

#3

• Aug 28, 2006

• #3

slow95gt said:

heck I run it on my car they are actually 1.72's so it is about 530 lift, and with the stock heads I dont have a prob, you shouldnt either.

Click to expand...

Stock heads have much smaller valves than Edelbrock Performers.

I've had both Edelbrock and FRPP tech lines say "no" to this exact question. They both recommend 1.6 rollers.

 

S

superhuaman

New Member

Nov 8, 2004

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Harrisburg, PA

Aug 28, 2006

#4

• Aug 28, 2006

• #4

i have 1.7 cobra rockers on my 306 with gt40 (not gt40x) aluminum heads and an e cam. will i have any problems with p to v clearance? i checked it and it seems like it will be alright...

 

R

R2D2

Aug 28, 2006

#5

• Aug 28, 2006

• #5

use either of the 2 methods and never listen to anyone on a forum.

 

S

superhuaman

New Member

Nov 8, 2004

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Harrisburg, PA

Aug 28, 2006

#6

• Aug 28, 2006

• #6

well i checked it with the feeler gauge method and it passed...i think. but wont the valves still hit the pistons if you float them?

 

foxbody88stang

New Member

Jun 4, 2006

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COLUMBUS,OH

Aug 28, 2006

#7

• Aug 28, 2006

• #7

No problem my brother is running 1.7s with an e cam and 14 lbs of boost. With preformer alum heads.Let us know how she runs.Good luck.

 

bryce93lx

Member

Jan 20, 2006

88

1

19

Luke AFB AZ

Aug 28, 2006

#8

• Aug 28, 2006

• #8

i have dart pro one heads with the e and my engine builder insisted on 1.6's(i am a bigger is always better kinda guy), i trust him implicitly, he said i really did not need more lift and it would be to close on the p to v but your application may be different

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

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Senoia, GA

Aug 29, 2006

#9

• Aug 29, 2006

• #9

superhuaman said:

well i checked it with the feeler gauge method and it passed...i think. but wont the valves still hit the pistons if you float them?

Click to expand...

Yes they can still hit if you float them, so invest in some quality valve springs.

 

S

superhuaman

New Member

Nov 8, 2004

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Harrisburg, PA

Aug 29, 2006

#10

• Aug 29, 2006

• #10

795.0pacecar said:

Yes they can still hit if you float them, so invest in some quality valve springs.

Click to expand...

I just have the ones that came on my heads from FRPP, along with the stainless steel valves. are they any good?

http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=1772

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

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Senoia, GA

Aug 29, 2006

#11

• Aug 29, 2006

• #11

I dont know about the springs that come with the GT-40 heads, but TFS recomends these springs when using the TFS stage 1 cam and 1.7 rockers which produces similar lift to that of the E cam with 1.7 rockers. http://store.summitracing.com/partdetail.asp?autofilter=1&part=TFS-31400414&N=700+0&autoview=sku

 

S

superhuaman

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Nov 8, 2004

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Harrisburg, PA

Aug 29, 2006

#12

• Aug 29, 2006

• #12

according to summit racing, those tfs springs have:

Installed Height (in) - 1.800 in.
Seat Pressure at Installed Height (lbs) - 125 lbs.
Open Pressure (lbs) - 365 lbs.

and the frpp springs have:

Installed Height (in) - 1.800 in.
Seat Pressure at Installed Height (lbs) - 125 lbs.
Open Pressure (lbs) - 325 lbs.

how big of a difference is this?