cam suggestion
08-03-2006, 12:27 AM
#16
Banned
Join Date: May 2003
Location: LA (lower Alabama)
Posts: 6,661
Re: cam suggestion
Originally Posted by Zigroid
I changed to 8cc valve reliefs. did you use a deck height of .025? I forgot if it was .020" or .025" stock but when I put in 8cc and .025" I get the exact same numbers as you.
I didn't want to go really high on the DCR since he has a stock radiator/cooling system with a 160 degree thermostat. I remember a while back you suggested running close to 9:1 with a GOOD cooling system. I don't know what your definition of good is but I wanted to play it on the safe side.
we aren't really in a hot area but it gets to 95-100 tops in the summer. would the cooling system be able to handle that or should we stay on the safe side? upgrading the radiator would be out of the budget really.
also the quench is a little on the high side at .051 with a .025" deck height and a .026" gasket.
oh and advancing the cam 4 degrees, basically changing the intake centerline from 110 to 106, right?
I didn't want to go really high on the DCR since he has a stock radiator/cooling system with a 160 degree thermostat. I remember a while back you suggested running close to 9:1 with a GOOD cooling system. I don't know what your definition of good is but I wanted to play it on the safe side.
we aren't really in a hot area but it gets to 95-100 tops in the summer. would the cooling system be able to handle that or should we stay on the safe side? upgrading the radiator would be out of the budget really.
also the quench is a little on the high side at .051 with a .025" deck height and a .026" gasket.
oh and advancing the cam 4 degrees, basically changing the intake centerline from 110 to 106, right?
Correct on the ICL.If advanced it will shift some TQ down lower.
Well GOOD cooling is a high GPM EWP,3 flue by 1" rad and Evans coolant. Ya might want to keep it around 8.5/6 and get some Evans coolant.Ya will be OK then.
Last edited by 1racerdude; 08-03-2006 at 12:30 AM.
08-03-2006, 12:50 AM
#17
Registered User
Join Date: Oct 2002
Location: Upstate NY
Posts: 2,931
Re: cam suggestion
Originally Posted by Spitfire557
Haha, I shot Lloyd an email just to see what he suggests.
I didn't say it was a bad choice, but it's not a cheap one.
I'm guessing Lloyd will suggest an (###) cam.
(post sanitized by the Cam Gods. Sorry.)
08-03-2006, 12:57 AM
#18
Registered User
Join Date: Apr 2006
Location: Bellefonte, PA
Posts: 122
Re: cam suggestion
Originally Posted by OldSStroker
The related valvetrain parts might get a little expensive if you plan to run it a lot and are looking at 6500+.
08-03-2006, 12:58 AM
#19
Registered User
Thread Starter
Join Date: Feb 2004
Location: Stroudsburg, PA
Posts: 948
Re: cam suggestion
Originally Posted by OldSStroker
FWIW, 3192 and 3194 lobes are quite aggressive. The related valvetrain parts might get a little expensive if you plan to run it a lot and are looking at 6500+.
I didn't say it was a bad choice, but it's not a cheap one.
I didn't say it was a bad choice, but it's not a cheap one.
. I was hoping that the extra area under the curve provided by the higher lift lobes would boost power without needing to rev higher.if those lobes are too aggressive, there are another set of lobes.
theres also lower lift lobes that are .536" intake and .544" exhaust that also cuts the .200" duration from 152 to 145 for the intake and 157 to 151 for the exhaust. trying to maximize area under the curve so I'd rather use the high lift lobes.
the valvetrain will consist of:
1.6:1 NSA roller rockers, 7/16" studs, comp beehive springs (im assuming these are what are installed on the heads since they are brand new LE2 heads), gmpp guideplates, and comp hi-tech pushrods.
too much for the valvetrain? any changes need to be made?
08-03-2006, 01:27 AM
#20
Banned
Join Date: May 2003
Location: LA (lower Alabama)
Posts: 6,661
Re: cam suggestion
Originally Posted by Spitfire557
I don't plan on running it a whole lot, I haven't even put 3,000 miles on the car since I bought it last August, and I SURELY don't plan on spinning 6,500+ on the stock bottom end.
Yea, but do you realize how many 1/4 mile passes is in 3,000 miles.That's a lifetime for a trailer queen. He is talking longevity.
My cam is 183.7@200 and plan on street duty and 7000RPM's. But ya also have to consider I built it to do it and it's NOT a stock bottom end or valve train and I will probably break/wear out a lot of valve train parts too.I'm aware of the problems but choose to do it.
08-03-2006, 01:44 AM
#21
Registered User
Thread Starter
Join Date: Feb 2004
Location: Stroudsburg, PA
Posts: 948
Re: cam suggestion
Originally Posted by 1racerdude
Yea, but do you realize how many 1/4 mile passes is in 3,000 miles.That's a lifetime for a trailer queen.
Originally Posted by 1racerdude
He is talking longevity.
My cam is 183.7@200 and plan on street duty and 7000RPM's. But ya also have to consider I built it to do it and it's NOT a stock bottom end or valve train and I will probably break/wear out a lot of valve train parts too.I'm aware of the problems but choose to do it.
My cam is 183.7@200 and plan on street duty and 7000RPM's. But ya also have to consider I built it to do it and it's NOT a stock bottom end or valve train and I will probably break/wear out a lot of valve train parts too.I'm aware of the problems but choose to do it.
08-03-2006, 01:57 AM
#22
Banned
Join Date: May 2003
Location: LA (lower Alabama)
Posts: 6,661
Re: cam suggestion
Originally Posted by Zigroid
I would guess about 3,000. 1/4 down the strip, 1/4 mile to slow down, 1/2 mile to come back to where you started
spitfire hasn't been to a dragstrip yet. I doubt he's gonna run it every weekend and compete in bracket races.
spitfire hasn't been to a dragstrip yet. I doubt he's gonna run it every weekend and compete in bracket races.
08-03-2006, 11:55 AM
#23
Registered User
Thread Starter
Join Date: Feb 2004
Location: Stroudsburg, PA
Posts: 948
Re: cam suggestion
ok based off what you guys said and what lloyd has recommended (using XFI or magnum lobes) I specced a similar cam with XFI lobes.
here it is:
Intake Duration - ID 274 | 224 | 149 | comp 3015 XFI lobe .573” lift w/ 1.6
Exhaust Duration - ED 280 | 230 | 154 | comp 3016 XFI lobe .576” lift w/ 1.6
Lobe Center Angle - LSA 110 | 110 | 110
Intake Centerline - ICL 106 | 106 | 106
Intake Valve opens - IVO 31 | 6 | -31.5 | BTDC (- indicates ATDC)
Intake Valve closes - IVC 63 | 38 | 0.5 | ABDC
Exhaust Valve Opens - EVO 74 | 49 | 11 | BBDC
Exhaust Valve Closes - EVC 26 | 1 | -37 | ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114 | 114 | 114 |
Overlap 57 | 7 | -68.5 | degrees
Bore 4
Stroke 3.48
Rod Length 5.7
Number of cylinders 8
Deck Height 0.025
Piston Dome or Dish (- for a dome + for a dish) 8
Compressed Head gasket thickness 0.026
Cylinder Head Chamber Volume 55
Static Compression Ratio 10.75
Dynamic Compresion Ratio 8.69
looks like the shorter seat to seat time bumped the dynamic compression up some. putting the cam on a 108 ICL instead of a 106 ICL drops the DCR to 8.52. may be better for his cooling system.
here it is:
Intake Duration - ID 274 | 224 | 149 | comp 3015 XFI lobe .573” lift w/ 1.6
Exhaust Duration - ED 280 | 230 | 154 | comp 3016 XFI lobe .576” lift w/ 1.6
Lobe Center Angle - LSA 110 | 110 | 110
Intake Centerline - ICL 106 | 106 | 106
Intake Valve opens - IVO 31 | 6 | -31.5 | BTDC (- indicates ATDC)
Intake Valve closes - IVC 63 | 38 | 0.5 | ABDC
Exhaust Valve Opens - EVO 74 | 49 | 11 | BBDC
Exhaust Valve Closes - EVC 26 | 1 | -37 | ATDC (- indicates BTDC)
Exhaust Centerline - ECL 114 | 114 | 114 |
Overlap 57 | 7 | -68.5 | degrees
Bore 4
Stroke 3.48
Rod Length 5.7
Number of cylinders 8
Deck Height 0.025
Piston Dome or Dish (- for a dome + for a dish) 8
Compressed Head gasket thickness 0.026
Cylinder Head Chamber Volume 55
Static Compression Ratio 10.75
Dynamic Compresion Ratio 8.69
looks like the shorter seat to seat time bumped the dynamic compression up some. putting the cam on a 108 ICL instead of a 106 ICL drops the DCR to 8.52. may be better for his cooling system.
Last edited by Zigroid; 08-03-2006 at 11:57 AM.
08-03-2006, 12:36 PM
#24
Banned
Join Date: Oct 2002
Posts: 6,518
Re: cam suggestion
Seriously just get a LE1, LE1 HL or a LE1.5 for this thing and not go thru all the BS trying to figure out what will work. You can call Lloyd up and get one direct from him.
The good thing about LT1 land is that it's not so cam centric as LS1 land, those goofballs want a new cam design every week based on some BS that puts them all out in left field.
Bret
The good thing about LT1 land is that it's not so cam centric as LS1 land, those goofballs want a new cam design every week based on some BS that puts them all out in left field.
Bret
Thread
Thread Starter
Forum
Replies
Last Post