07-14-2013
|
#1
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
valve spring Q
I am currently doing a build for my new talon and starting with the head
my Q is : I am installing a set of delta 272 regrinds, I have the head fully disassemble for decking and am wondering if I should up grade the valve springs while its apart, im thinking yes but im not positive. Lil help lol
__________________
Just couldn't stay away.
|
|
|
07-14-2013
|
#2
|
Join Date: Apr 2007
Location: Circle Pines
Drives: 1992 talon tsi 1995 corolla
Posts: 2,048
|
Re: valve spring Q
What are your goals for the car? How much power do you want to make? How high do you want to rev? As far as I know you need to upgrade with 272s but in my opinion if you can afford it since you have it apart I would just do it. I'd up grade the valves and the springs and retainers.
|
|
|
07-14-2013
|
#3
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Im shooting for 450 on e85, stock block, mild head build, I will look into the cost of valves but might have to just stick with upgraded springs,
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#4
|
Join Date: Apr 2007
Location: Circle Pines
Drives: 1992 talon tsi 1995 corolla
Posts: 2,048
|
Re: valve spring Q
A set of valves is like 200 to 400. But that sounds like a solid plan
|
|
|
07-15-2013
|
#5
|
Join Date: May 2005
Location: Linwood, MN
Drives: You crazy!
Posts: 2,354
|
Re: valve spring Q
What deltas are you going with. There are a ton of 272 options. You can get away with stock valves but you'll 95% of the time need to upgrade your springs. I Think evo springs and retainers should suffice unless they are high lift 272s
|
|
|
07-15-2013
|
#6
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
To be honest im not sure which really sucks, they came with the car and they are regrinds... I have some of the specs on them at home like lobe base diameter and hight and all the calculations.
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#7
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Ok I found my specs that I was able to get by measuring the cam lobe
intake and exhaust.
cam lift- .221
net lift- .375/9.525 mm
exhaust is only a few thousandths different from the intake
I was looking at maybe the BC springs and titanium retainers.
valves are not in the buget as of right now ,but I might be able to get a set if I hold off on assembly for a month or two...
__________________
Just couldn't stay away.
Last edited by blesi660r; 07-15-2013 at 01:34 AM..
|
|
|
07-15-2013
|
#8
|
flips McGee
|
Re: valve spring Q
OEM valves and done basic beehive springs that use stock retainers as an upgrade. Get some Evo valves if you must, but save going with oversized valves for when you need to repair damage. It's a DSM,keep it simple, keep the budget nice and goals realistic.
__________________
Quote:
Originally Posted by Murlo26
I need to listen to Scheides more often i think :)
|
Quote:
Originally Posted by turbotalon1g
...I realized that I can't keep up my shit talking without anything to back it up.
|
Quote:
Originally Posted by JV
S2000: For those of us that know the Miata is the best car on the planet, but also want extra power and to not have to turn in our man cards.
|
|
|
|
07-15-2013
|
#9
|
Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
|
Re: valve spring Q
That doesn't seem like it'd be that aggressive of a cam. However there is no black and white answer to whether or not you need or don't need to upgrade springs. Just have to measure out the risk and decide for yourself if it's worth it or not.
So just think through it. These cams, while not overly aggressive, are still more aggressive than factory, so they're going to be a little harder on the factory springs. They can probably take it, but how many miles are on these springs, how many of those miles are with the more aggressive cams? If this was a head with 50k miles on it, I'd probably just keep the stockers in and not rev it to the moon. However if you're talking a head with 100k+ miles, 20k of those are with the more aggressive cams, well then you're risk of inducing some sort of failure is going to start increasing.
From what I gather, you're on a tight budget. Beehives are great, but for your goals and what seems to be a tight budget, I'd just go with a single spring upgrade like Crowers. They are very affordable and should perform well enough for a mild cam setup like you have. That is probably what I'd personally do if I were in your shoes.
Or just stick with the stockers, but understand there's some risk involved, especially if the springs are in unknown condition/high milage. If you're willing to take that risk in an effort to conserve some money, that's your call. You may end up being completely fine, or you may end up floating a valve.
|
|
|
07-15-2013
|
#10
|
N17r0U$ br4D
|
Re: valve spring Q
^Very good advice.
If it were me I'd let it buck if the valve springs didn't have a ton of miles on them. If they did, I'd reaplace them with something cheap but will get the job done. No need to go crazy for your goals.
I rocked the dks regrind 272s on stock valve springs for a while making 450ish + on DB's dyno for what its worth without any problems.
__________________
My rice rocket best times
Pump Gas: 8.85 @ 152.3 in 2016
Race Gas: 8.982 @ 152.16 in 2014
|
|
|
07-15-2013
|
#11
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Thanks for the input guys!!! for 200 bones I think I will take the high road and pick up a set of BC springs and titanium retainers and run stock valves.
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#12
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Also I have no clue on milage of the head, had stockers in it when i got it , so far the head is getting decked and cleaned, and will have all new seals around, only thing im not doing is guides "well not yet at least"
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#13
|
Transmission destroyer
Join Date: Feb 2007
Location: Cambridge
Drives: G37, 91 TSi
Posts: 7,150
|
Re: valve spring Q
FP has their beehives on sale right now.
__________________
Quote:
Originally Posted by scheides
I swing from the nuts of cold hard data. Anything less is a guess.
|
|
|
|
07-15-2013
|
#14
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Besides map who do you guys go through... where are the fp ones on sale?.
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#15
|
N17r0U$ br4D
|
Re: valve spring Q
Hit up Jason at DB. They can usually get really good deals on stuff too, plus closer to you being north.
__________________
My rice rocket best times
Pump Gas: 8.85 @ 152.3 in 2016
Race Gas: 8.982 @ 152.16 in 2014
|
|
|
07-15-2013
|
#16
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Will do thank you.
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#17
|
Join Date: Mar 2005
Location: Blaine, MN
Drives: '91 Automagic
Posts: 13,908
|
Re: valve spring Q
I only read your goals and cam size.
I'd say 100% evo valve stuff and that will have you covered for good amount of RPM and even cam. It's what I'm going to be getting here shortly.
|
|
|
07-15-2013
|
#18
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
Im going to do some searching in dsmtuners on both the evo springs and BC.
__________________
Just couldn't stay away.
|
|
|
07-15-2013
|
#19
|
Join Date: May 2005
Location: Linwood, MN
Drives: You crazy!
Posts: 2,354
|
Re: valve spring Q
You can get evo springs for dirt and you'll be fine.
|
|
|
07-15-2013
|
#20
|
Join Date: Nov 2006
Location: north branch mn
Drives: 07-gsxr 750, 93 talon tsi awd
Posts: 554
|
Re: valve spring Q
I was doing some reading up on the evo springs , and I think im going to go bc with titanium retainers
__________________
Just couldn't stay away.
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|