I am literally hours away from starting my car and I am going nuts trying to figure out if I should start it or not?
I have DB 2.3 motor with DB stage 3 head. The cams are in but I didn't check any clearances since I was told they would work.

I checked DB's site and they don't ever tell you what springs they use, they just refer to them as "BR Evolution Custom Dual Valve Spring and Retainer Set". I wish they posred some specs for reference.
https://secure.buschurracing.com/cat...products_id=38

Here are Supertech's specs......but who knows which springs we have.
http://www.supertechperformance.com/cat-ivalves?id=7

And GSC's specs, R2 cams are .4mm lift higher tham the S3 cams are for both the intake and exhaust. FP5R cams are just about the same height....12.06mm going from .475" conversion.

 

If you start the car without checking the clearances, your just flat out dumb

I mean it straight up tells you that you need to check the clearances in every motor when you buy them

 

Yes, I guess I was being dumb. I went with their word and didn't think there would be any issues there.

I was told that they would work. I am not a professional engine builder.

How do you explain the other thread where they worked fine? Maybe they were a different model#?

 

Could of been bro. Just rip it all apart and check everything for them cams. Seat/retainer clearance, piston/valve clearance,ect.

Better to be safe then start up your brand new motor and kill it. I asked buschur directly and he told me he never used the cams, so he couldnt give me an answer on if they work or not with his heads

 

Yeah.
The motor rotates fine even though you can really feel those valve springs when spinning it by hand. Now, I am thinking that it might be worse due to some retainer to seal contact but I would have to check it. I am thinking of just going with GSC 5041 springs/retainers as well.
I had had that thought before and we know that the cams will work with them. This is not an initial build, I just bought the car and 40 miles after it came off of the car carrier the vlaves hit the pistons and spit off the intake side rockers. Not sure if this was due to a bad lifter or installation error but the Mivec gear was fubarred and the Kelford 272 cam as well. This was months ago....between parts and only working on the car here and there....
I guess the next question is should I replace the seals as well or leave the Supertechs in?
Probably whould just replace them and check the clearance....

 

There are seals out there that are shorter then stock ones, im not sure which ones they are though off the top of my head. Id try to find out which ones they are and use them for some extra clearance.

 

Are the supertechs longer or shorter than OEM?




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Better check them!!!!!

 

Supertech dual springs have issues with Kelford 272s as well. I'm back to running OEM springs, after going through 2 sets of Supertechs.

 

Really? What kind of issues?
Them cams only have 11mm of lift. Id consider that a small cam

 

After my issues, this is one of the reasons I will probably go with the GSC 5041 beehive springs.
A few people have pointed towards Supertech duals as part of the issue.

 

Thanks for the info!

 

This is what i got... You can see the second "step" on the bottom of the retainer. If it were machined off like it would be with a single setup i would have enough clearance. Idk about other duels, they may be different but i would think most duel retainers have this step. Anybody got pics of another brand?

 

i never had issues with supertech dual valve springs on kelford 272 (mild cams), vs 280's. (put 20K+ miles on that setup).

plenty of my customers run supertech dual valve springs with s3's as well and have absolutely no issues what soever. so your info is definitely skewed, or you were sold maybe a knockoff product somehow or the wrong springset in general? if you still have the springs id send them to supertech to get inspected.

Buschurs stage 3 head uses manley valves and supertech dual valve springs and his head is on plenty of cars with very aggressive cam profiles.

but yes for the R2's id only use kiggly or GSC 5041' kit. whenever i sell R2's i have the customer get the 5041 beehive high rev spring set with ti retainers.

 

Looks like 1mm+/-....can you measure the height on that inner step?
If it is 1mm and they work on S2s or S3s then it would work if it wasn't there. The R2s are .4mm taller on both intake and exhaust than S3s.

If I/we switched to GSC 5041 would the seat need to be changed?