[Z06] Cam install
07-02-2020, 08:05 PM
#1
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Cam install
Had a shop install btr cam with 38% fuel lobe lifters, pushrods, they have tuned it several times now they say fuel pressure problem now it was supposed to be a btr cam package stage 1 received cam card they installed comp cam with LS7 lifters they added 50 thousand to a 7.85 pushrod. During the first tune dropped a lifter so they had to replace it any advice?
07-02-2020, 10:19 PM
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07-02-2020, 10:32 PM
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An LS7 pushrod is 7.75" in length
You said they added 50 thousands of length to a 7.85" pushrod .... So, now you have 7.90" pushrods in an engine designed for 7.75" pushrods.
You got problems ....
___________________________________
The only advice I can give you is to find another shop to work on your engine.
___________________________________
BTW .... Please explain what in the hell are "38% fuel lobe lifters"
You said they added 50 thousands of length to a 7.85" pushrod .... So, now you have 7.90" pushrods in an engine designed for 7.75" pushrods.
You got problems ....
___________________________________
The only advice I can give you is to find another shop to work on your engine.
___________________________________
BTW .... Please explain what in the hell are "38% fuel lobe lifters"
07-03-2020, 07:46 AM
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07-03-2020, 09:34 AM
#6
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An LS7 pushrod is 7.75" in length
You said they added 50 thousands of length to a 7.85" pushrod .... So, now you have 7.90" pushrods in an engine designed for 7.75" pushrods.
You got problems ....
___________________________________
The only advice I can give you is to find another shop to work on your engine.
___________________________________
BTW .... Please explain what in the hell are "38% fuel lobe lifters"
You said they added 50 thousands of length to a 7.85" pushrod .... So, now you have 7.90" pushrods in an engine designed for 7.75" pushrods.
You got problems ....
___________________________________
The only advice I can give you is to find another shop to work on your engine.
___________________________________
BTW .... Please explain what in the hell are "38% fuel lobe lifters"
07-03-2020, 09:51 AM
#7
OP has made (5) different threads about cam installs in the C6 and C7 sections, and all his posts are very incoherent. I'm starting to think the OP is more confused than Joe Biden.
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07-03-2020, 12:57 PM
#8
Burning Brakes
07-03-2020, 01:15 PM
#9
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I think he meant to put a comma between lobe and lifters. LS7 lifters/trays in a C7 is common when deleting the DOD/AFM. We use 7.850 length push rods on LT builds. Beyond that I have no idea what's causing his issue.
07-03-2020, 02:08 PM
#10
Melting Slicks
Doesn't the lt4 cam have a lobe for the di pump, which is generally increased by 34 to 38% in aftermarket cams? Pretty sure this needs to go to the c7 forum.
As far as it being a comp cam instead of a BTR, that's between him and his installer but maybe BTR is done on comp blanks? Do they make their own blanks? No idea, just throwing it out there.
Either way, wrong forum.
As far as it being a comp cam instead of a BTR, that's between him and his installer but maybe BTR is done on comp blanks? Do they make their own blanks? No idea, just throwing it out there.
Either way, wrong forum.
07-03-2020, 03:58 PM
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07-03-2020, 04:26 PM
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You have a C7 ... So why are you posting this on the C6 forum ?
07-03-2020, 05:22 PM
#15
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As far as the lifter collapsing that sounds like a freak premature failure or an installation issue. What all is done to the car in terms of modifications, are they trying to say that now you've upgraded the high side you are running out of low side fuel pressure? Pump gas or E85?
Last edited by Dane@LGmotorsports; 07-03-2020 at 05:22 PM.
07-03-2020, 05:34 PM
#16
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Dane ..... I think your wasting your time with this.
I don't think the OP has a clue about what's going on with his engine ... not a clue
I don't think the OP has a clue about what's going on with his engine ... not a clue
07-03-2020, 07:04 PM
#17
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