ok,what i want to know is has anyone had experience with running an aftermarket spring and retainer with stock h22a camshafts,i have checked the faq and the topic has not really been answered. The Reason I Ask is because i have seen exhaust valves bent from valve float so upgraded springs and retainers could fix this issue but stay with o.e quality camshafts.....

 

you arent going to float stock valvetrain without running bigger camshafts, racing without a rev limiter or a mechanical overrev. I have taken my stock head as far as 8500 without problems and on stock camshafts (pending chassis) you dont have to rev out that high. I only did it in first and second to get my boat going. If you are in a lighter chassis, it doesnt take as much to get the momentum flowing.

 

Well, Valve Float Is The Only Thing That I Could Explain To Bend all the Exhaust Valves but yet Still Be driveable...I Figure they were bent enough to not really notice a power loss

 

sounds like a mechanical over rev to me.

 

Newb alert!

Was going to search for this just now and seen a thread on the first page! I'm doing my first engine build and have a similar concern. I have to rev to 8600 or I run out of 4th! So that's 8000rpm+ somewhat sustained.

Not an allmotor application but I'm very curious to know - is there anything wrong with putting aftermarket valve springs/retainers on OEM camshafts?

I was thinking it wouldn't hurt to go with the higher spring rate (that supertech offers) because the cams aren't as aggressive? Is my logic correct? or would that be overboard and creating extra unnecessary mechanical loss?

 

no, there isn't the only drawback is a potential hp loss due to the increase in spring pressure. will you notice it? i doubt it. visualize the lobe rolling, now think about it at 50lb, 70lb and 100lb. it still will open the valve 100lb just has more resistance than 50lb. more stable yes but also more parasitic

 

you will be fine. i have supertech and stock itr to 8900

 

Not too sure about the stiffer valvetrain causing parasitic loss. Not sure, because, there are always as many valves closing as opening, so the force of the spring closing on the camshaft on another cylinder may balance out the increased spring pressure at the valve thats opening.

If im wrong, and there is some loss, like others have said, you wont notice it. The only reason to not run more spring pressure than you have to, is that stuff gets beat up faster.

 

i remember reading about spring pressure and hp in a book about nascar. their whole goal was to find enough pressure to control the cam and rpm they operated at but not more. of course either i don't remember or they didn't clarify what kind of losses higher spring pressure caused. could have been 1-2hp which would be something a race series that tight would notice. the other thing is the modular valvetrains use MUCH lower spring pressures than a solid roller V8. so, it's quite possible i suppose that going from a 50 to and 80lb spring could cause less than 1hp of less and not even be measurable. i actually have no idea on hard numbers

 

Has anyone done this first hand experience........................

 

soo. i m going to be doing this, an answer to the first hand experienceouldbt really appriciated

 

Do It! i had the same thing happen to my h22 bent 6 exhaust valves and two intake and broke 2 valve guides. mechanical over rev missed 4th gear at about 8200 +/- and hit second... ended up replacing all exhaust valve guides, and it was actually cheaper for me to replace the valves with skunk2 high compression valves than it was for me to get them from the dealer... i found out the reason i got them cheap was that they were over sized... but thats another story... anyways i upgraded the valve springs and 1 week after getting the car back on the road after all the machine work and upgrades and getting tuned i did the same thing... missed 4th at about 8500 rpm and hit 2nd. and this time the oil pump took a crap a killed a couple rod bearings but the top end handled it just fine

its deffinately worth doing if you plan to add cams down the road or raise the rev limmiter

h22 trannys FTL!!!!!!

 

dont get the retainers if its your daily. not worth the money and they were quicker

 

could you explain more on "and they were quicker"???

 

explaination: misspelling

He means "WEAR"

 

Lol honda-tech and alcohol dont mix

 

i'm running supertech springs and retainers on a stock f20b cam, limiter is only 8100 but i'm there alot of the time, i put them in just for security and any future mods.

 

To start off with if your stock f20b cams came out a five speed then there actually type s cams so its a good thing you have after market support for them . Also if you still have the springs out the f20b head (if its a five speed motor) there type s valve train and really good stuff. Ive been running my f20b valve train (type s) on pro 2 cams for five years running low 12s. Look on the end of the cams if one has one line around it and the other has two there type s man good luck .

If anyone wnats to stop bending exhaust valves on stock enigines (which can be done by over eeving seen it 20 times ) just replace your exhaust springs with intake springs and that will be more then enough to handle any reeve with a stock cam . As for mechanical over reev nothing you can do to stop that .

Type s valve train run stock intake springs on the exhaust side and then upgrade the intake side thats all (yes i have checked the spring pressure myself ). I have been running stock type s valve train (actually out of a five speed f20b motor same stuff) on skunk2 stage 2 and pro2 cams for five years no problems. So thats stock intake springs on the exhaust side and upgraded spings from honda (type s 0 on the intake side no problems.

Hope this helps good luck guys.

 

hi, i'll be homest it was an auto engine but i put the cams from my type s motor in, so in theory its now same as manual engine,

 

so in short and in summary,

aftermarket lighter valves (for argument sake ferea brand), double spring (for argument sake supertec) and titanium retainers (for argument sake supertech) on stock cam will not harm the engine and those will not float and i wont lose power more than 3 hp because of dual springs being stiffer

 

it'll be a safe setup mate, you wont notice any power loss plus you'd be able to run bigger cams one day without having to go through it all again

 

Thank you very much Golding.racing...that's what i wanted to hear

 

well i can say that my engine now has 900 miles and the rocker pads look
good and all is well , engine revs hard and i can say that the o.e. cams dont show any extra wear......................