Here is an extra set of 12 Comp Cams 980-12 quality valve springs that I am clearing out.. These will work on a 3.4L/3.1L/2.8L 60* V6 with a modified or stock cam. These were the ones recommended for my 3.4L turbo application. They are outer springs with an inner dampener spring. Direct fit without modifications. The set is brand New in the box. Lowest price in the country $29 + $5 shipping ( lower 48 ) pay pal accepted
PM if interested






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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 01-05-2016).]

Dennis,
Asking on behalf of the "modders" out there. Will these springs work with a Crane H272 cam (.454/.480 lift), without additional head work for spring clearance?
Asking because stock (and most other "single" springs) require machining so that the coils won't bind at full lift.

Good price.

quote Originally posted by Raydar: Dennis, Asking on behalf of the "modders" out there. Will these springs work with a Crane H272 cam (.454/.480 lift), without additional head work for spring clearance? Asking because stock (and most other "single" springs) require machining so that the coils won't bind at full lift. Good price.

Just realized I had the wrong part number listed -corrected. They are 980-12 springs. I have used these springs with a 272 Comp Cam . It was a custom grind for a 3.4L turbo application but IIRC the lift was something like .440/460. The lope with that cam is very noticable. So lets add a caveot. For 90% of all PRACTICAL street strip applications these springs should accomodate any 60* V6 cam that can be used. No valve spring can be used as a direct fit with every single camshaft made plus if you decide to put a .480 lift 272 cam in your 60* V6 good luck with the ECM handling it and kiss goodbye to smooth running emissions and mileage.


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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 01-05-2016).]

quote Originally posted by Dennis LaGrua: ... if you decide to put a .480 lift 272 cam in your 60* V6 good luck with the ECM handling it and kiss goodbye to smooth running emissions and mileage.

My built up 3.4 with a Crane H272 ran really well. Felt like it had almost as much power as my 4.9. (This was with headers, a Trueleo intake and 800 worth of head work.)
It had a nice thump to the idle, but passed emissions every time, running a nearly stock tune, but with 19 lb injectors. It did run a little rich with those injectors, but nothing the ECM couldn't compensate for.

Edit -
From Summit...
Installed Height (in): 1.700 in.
Open Height (in): 1.250 in. (.45 lift)
Coil Bind Height (in): 1.150 in. (.55 lift)
Seat Pressure at Installed Height (lbs): 92 lbs.
Open Pressure (lbs): 230 lbs

Looks like they won't coil bind with an H272, but it exceeds "open height" spec for even an H260.

[This message has been edited by Raydar (edited 01-09-2016).]

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