How can yout ell when your engine isn't "matched" properly?
07-11-2005, 09:19 PM
#1
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How can yout ell when your engine isn't "matched" properly?
I've heard people saying you need to "match" up your heads, intake, and cam. It makes sense, however I was wondering if there's any way to tell if the ones on your car aren't matched properly?
Thanks.
Thanks.
07-12-2005, 09:32 AM
#4
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Re: How can yout ell when your engine isn't "matched" properly?
Well mine souds good then. The cam is lopey, but it's a pretty high lift cam, so it should be right? The car has plenty of power so I'm guessing I'm okay.
07-12-2005, 09:33 AM
#5
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Re: How can yout ell when your engine isn't "matched" properly?
Stock parts are usually fairly well matched, because a matched combo is a more effiecient combo.
If you want to add parts, check the description of what you are buying and talk to others who have used those parts to find out what RPM range the part operates best in, and what other parts work well with it.
- Justin
If you want to add parts, check the description of what you are buying and talk to others who have used those parts to find out what RPM range the part operates best in, and what other parts work well with it.
- Justin
07-12-2005, 08:59 PM
#7
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Re: How can yout ell when your engine isn't "matched" properly?
its like this
you want an intake made for the RPM range your cam can give you (duration) and you want the cam to not have more lift than your heads can flow as well as you dont want that cam to be outside of your rear end gear ratio.
you want an intake made for the RPM range your cam can give you (duration) and you want the cam to not have more lift than your heads can flow as well as you dont want that cam to be outside of your rear end gear ratio.
07-12-2005, 09:31 PM
#8
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Re: How can yout ell when your engine isn't "matched" properly?
Everythings aftermarket. I'm not positive on the size of the cam, but think of my car like DevilsAddvocate's siganture. It's pretty big. The heads are 2.02 cast iron heads out of an older Camaro. Intake is Edelbrock, not sure on what size exactly. I'll try to find out tomorrow.
07-13-2005, 12:23 AM
#9
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Re: How can yout ell when your engine isn't "matched" properly?
Measuring cranking compression on all cyls can give you a good indication if things are really out of whack. Something in the 175-200 range is GOOD. Much lower and in the low 100's can raise some flags. Too much cam, or not enough compression, timing could be off, etc.
A "lopey cam" could honestly be a plug not firing. An overall tuneup and making sure each cyl is getting fuel and spark needs to be established.
A "lopey cam" could honestly be a plug not firing. An overall tuneup and making sure each cyl is getting fuel and spark needs to be established.
07-13-2005, 12:37 AM
#10
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Re: How can yout ell when your engine isn't "matched" properly?
right i forgot to mention you need to have more static compression the bigger cam you go
also its kinda hard to say how well your stuffs matched up if we have no idea what you have. Dont wanna sound like a dick but its true
also its kinda hard to say how well your stuffs matched up if we have no idea what you have. Dont wanna sound like a dick but its true
Last edited by DevilsAddvocate; 07-13-2005 at 12:39 AM.
07-13-2005, 01:33 PM
#11
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Re: How can yout ell when your engine isn't "matched" properly?
Intake: Edelbrock performer.
Cam: Don't know. It's big though.
Carb: Right now it's a Holley 770cfm Street Avenger, soon it'll be an Edelbrock Thunder 650 cfm.
Heads: 2.02 Cat iron heads.
Anyhing else you need to know?
Cam: Don't know. It's big though.
Carb: Right now it's a Holley 770cfm Street Avenger, soon it'll be an Edelbrock Thunder 650 cfm.
Heads: 2.02 Cat iron heads.
Anyhing else you need to know?
07-13-2005, 04:12 PM
#12
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Re: How can yout ell when your engine isn't "matched" properly?
yea i don't wanna sound like a dick either, but to insure everything is matched up right, we need to know the duration of the cam, lift of the cam, and flow numbers of the heads...
If everything is running right, and you have instant power when you hit the gas, it sounds like you are in the ballpark as far as things matched up...
If everything is running right, and you have instant power when you hit the gas, it sounds like you are in the ballpark as far as things matched up...
07-13-2005, 04:52 PM
#13
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Re: How can yout ell when your engine isn't "matched" properly?
Sorry I can't get that now. I'm pulling the cam next week and I'll try to find out. I do have plenty f power when I hit the gas, so I'm gonna assume it's pretty good.
07-13-2005, 05:25 PM
#14
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Re: How can yout ell when your engine isn't "matched" properly?
Generally you want everything to run in the same RPM designation.
You DONT wanna get a cam that's good from 3k-7k, an intake thats good from off-idle-4k, and then some 2:73 rear-gears because your car is gonna run like @$$.
You DONT wanna get a cam that's good from 3k-7k, an intake thats good from off-idle-4k, and then some 2:73 rear-gears because your car is gonna run like @$$.