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Engine - General, Exhaust & Induction Topics about the general engine items, exhaust system discussed here & Improving the intake tract - air filter to intake valve.

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Old 12-09-2012, 12:31 AM   #1
single groove valves?  
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Our stock exhaust valves are multi-groove correct?
Where can single-groove valves be found?
Are the ones from FWD-P single-groove?
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Old 12-09-2012, 10:28 AM   #2
Re: single groove valves?  
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glhs727 is keeping our cars runningglhs727 is keeping our cars running
we sell single groove, depends on size and swirl or g-dead? what do you need?
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Old 12-09-2012, 04:23 PM   #3
Re: single groove valves?  
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Head will be a Swirl port w/ 3.3 conical springs, looking for +1mm's
Reading through some info and saw single-groove valves were necessary.
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Old 12-09-2012, 08:53 PM   #4
Re: single groove valves?  
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glhs727 is keeping our cars runningglhs727 is keeping our cars running
usually those will be a triple groove, but I have some custom ones done for another customer doing the same thing, so I had an extra set made. Call me if needed....
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Old 12-10-2012, 12:36 AM   #5
Re: single groove valves?  
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Cindy doesn't sell the beehive setup, only the old stuff. The angle of the keepers for a 2.2 is strange at 8 degree's. Most keepers are either 7 or 10 degree's. You can't buy the 7 degree keepers with a muilti groove. There are people that run stock valves with keepers 1 degree off without trouble, but that shouldn't be pushed.

So the best way to run the new tech is to buy the SS +1 valves for single square groove. FWDperformance has them but you have to ask.

Keepers are the big pain, 5/16" and 8mm are really close and 7 and 8 degree are really close. But you don't get a true lock. Thank God beehives don't really float lol so you don't find out very easily but it could happen.

Also remember 3.3s need the .050" shims to get up to stock seat pressure.
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Old 12-10-2012, 08:59 AM   #6
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stock exhaust valve keepers are triple groove;
stock intake valve keepers are single.

the OE single (intake) keepers can be used with Mopar (and other aftermarket) 'single groove' oversize valves,
both intake and exhaust...

they also work fine with the GM '3100' retainers for the conical spring conversion.
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Old 12-10-2012, 11:24 AM   #7
Re: single groove valves?  
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your an example of long term 3.3 use with a 7 degree retainer and a 8 degree keeper / lock.

Conicals float, at some point, but no doubt way higher than we rev anyway lol. So they may never fail on your engine. By now you've been seeing the benifit of having them for years. I've had my springs tested and normal springs when pushed 6500 all degrade in seat and open pressure. They fail up to 40 lbs of seat pressure on the worst one, normall 15-25 lbs. Combine that with factory lifters squishing over time and it's no wonder they make noise lol.

Still the down side is no big cams, but the 88 turbo and TBI are the most popular cams anyway. Most never see a big lift cam. Making the 3.3s sound better. Of course 3.3s don't work if you read TM, but Simon never followed the directions and shimmed them..
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