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I found some springs that are 125# with the valve closed, 196# with it at full open (stock cams). Stock springs are 80# and 180# for 91. Thats 45# more at seat and 16# more at peak lift. Wouldn't this setup be better for boost or should I keep looking?
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Ben
60DegreeV6.com
WOT-Tech.com -
i guess it all depends on what you are looking for. you should rev much higher with those springs, or you could run much more boost than the stock ones. would it be safe to assume, 16 psi more due to it only being 16#'s more at peak? dont want the boost trying to move the valve on its own, probably cause problems.If you aren't friends with a liar, you aren't friends with anyone. -
When valves float, the initial stages of float are characterized by the valve bouncing when it comes back to the seat... higher seat loads fix that.
Only at higher RPM's than initial valve float do the valves actually go into a no-follow condition (leave contact with the cam lobe after peak lift).
So yes, those spring swould help. Keep them in mind if you don't find anything else...Current:
\'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
\'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
\'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant
Gone, mostly forgotten:
\'90 Pontiac 6000 SE AWD: slow but invisibleComment
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i may be interested when i do a cam regrind. keep the info handy until then.The Official Rotating Mass NaziComment
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Im trying to find a better price on the springs right now, but I am planning on trying them out as soon as I find a spring seat that fits (stock doesn't).Ben
60DegreeV6.com
WOT-Tech.comComment
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I'd be interested as well. As I've stated elsewhere, I plan on running a turbo, and I believe stiffer springs would be useful. As soon as you have a combo that works, it's gonna be up on the store?92 Lumina Z34
Found coolant in the oil and metal in the filter.
Also found a home in the engine compartment for a turbo and intercooler
<a href=http://www.cardomain.com/memberpage/813554>Some pics at CarDomain</a>Comment
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Does anybody have a stock spring that they have miced? I need to know all the stock dimensoins of the factory spring.I may own a GTO now, but I'm still a 60V6er at heart.Comment
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TDC/DOHC specs ('92-'95 and '96,'97 have same specs)
From Helm manual.
Code:LQ1 Free Length 42.04mm (1.6551") Installed height 35.56mm (1.400") Seat Load 65 lbs Valve lift 9.398mm (0.370") Same lift as the Northstar Open load 160 lbs Open height 26.16mm (1.030")
Current:
\'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
\'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
\'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant
Gone, mostly forgotten:
\'90 Pontiac 6000 SE AWD: slow but invisibleComment
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Another set of measurements I have at the shop:P Send me an email to remind me that you want the stock spring measurements.Ben
60DegreeV6.com
WOT-Tech.comComment
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Specs for Northstar and TDC springs, including rate calcs.Current:
\'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
\'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
\'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant
Gone, mostly forgotten:
\'90 Pontiac 6000 SE AWD: slow but invisibleComment
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OK that is what I was going to ask; are they 'drop in'.......??Originally posted by sappyse107
plus what is the advantage over simply shimming the stockers, assuming that stock cams are going to be used in either case - so that coil bind isn't an issue.
Altho replacing old springs isn't really a bad idea on most of these motors after 125,000 miles or so...Comment
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That is my main concern, the age of the springs. Shimming the stock replacement TRW springs will get you back to about stock 91 specs. If your current 91-95 springs are good, which is highly doubtful even with the age, since sitting for lengths of time is also bad for the springs that are under load the whole time.
They don't drop in because of the stock spring seats. I am going to try and modify some seats to work, otherwise I will have to have some made. I am not giving up on looking for other springs just yet but these are worth a shot since they are brand new comp springs.Ben
60DegreeV6.com
WOT-Tech.comComment
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Ok, I have found a seat that works
I have to modify the stock application seats, then the stock DOHC valve stem seals go around the guide, and the new seat slips around that. I don't have my stem locks here nor my flash card adapter to stick in the laptop, but this is almost officially working. Just gotta lock it down first, then buy more of them to test them in the car. Ill have to sell the springs with the modified seats to fit this application. Im going to get a hold of comp and see what kind of pricing I can get on the springs as well.
Ben
60DegreeV6.com
WOT-Tech.comComment
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No replies...more springs for me then! hahaha. I have several pictures up of the springs and the modified seats.
For those that haven't seen a stock spring alone, its the short fat one. The tall skinny one is the new spring. I should have pricing soon and then hopefully get a set for my car and test them out.Ben
60DegreeV6.com
WOT-Tech.comComment
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look at pic "spring compare 7" for the simple view
wow; Ben; they look SO different; do you know what the peak redline is for the new spring you are showing? It is considerably thinner, isn't it? Which isn't necessarily a bad thing. I think people are waiting for your in-car testing........ I am.
thx for all the work.
gpComment
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