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intimadatorsquizz


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Date: Feb 28, 2011
Jim needs help
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ok guys i got my bonus check coming and i want to order parts for my car. i want to change the
headers
exhaust
cam& lifters and add 1.6 rockers

this is my engine

http://www.gmhorsepower.com/Fast-Burn-385-Turn-Key.php


first off what do you think of these headers?

http://www.jegs.com/i/Hedman/500/68608/10002/-1

second this is the cam spec for what i have in there now. and the heads i have.

Camshaft lift (in):.474 intake / .510 exhaust
Camshaft duration (@.050 in):208'c1 intake / 221'c1 exhaust
Cylinder heads (P/N 12464298):Fast Burn aluminum; 62cc chambers
i'm looking for more power but also that lumpier sound.

was looking at this.GM # 12480002 Hot cam kit
is supposed to push my motor to 425hp from 385hp
cam specs
Duration @ .050 Lift (deg): I: 218, E: 228
Maximum Lift (in) w/1.5 rocker: I: .492, E: .492
Lobe Centerlline (deg): 112

my springs will only allow up to 525 lift so i'dd have to change springs when i go with the 1.6 rockers.

i also have a RPM Airgap to be added on.

help me figure out what the hell to order.
i'll also be running 3" exhaust dumping out behind the rear tires.





-- Edited by intimadatorsquizz on Wednesday 2nd of March 2011 08:33:10 AM

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mattthias


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Jim, How about a nice V6. Then you wouldn't have this dilemma. Hope that helps, lol.!!!! :)

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intimadatorsquizz


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mattthias wrote:

Jim, How about a nice V6. Then you wouldn't have this dilemma. Hope that helps, lol.!!!! :)


and i'm sure you would have no trouble trading me for my v8 correct? disbelief

 



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mattthias


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Was that an insult?!!! I have a V8. I know its not the SS version but hey.......confuse

lol..

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intimadatorsquizz


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oh sorry i thought you had the 4.3 V6....

but you and Timmy are still low and slow...lmao

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mattthias


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hahah. I know. I like to give people a chance to see my car when I drive by, lol.

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intimadatorsquizz


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come on guys..... no one has any help for me..... the season will be here soon and i want to get parts ordered

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frankoc


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wish I could help. Now if you were removing undercoat and detailing the undercarriage, call me!

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TURNA


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While I am a fan of shorty headers for there ease of installation and maintenance I would invest in a set of long tube 1 5/8 headers and a 2.5 inch exhaust.


With a 3" exhaust and a 350 you may be to large and reduce the velocity of the exhaust gasses passing through the exhaust system. In doing so they diminish the emptying out or "scavenging" effect in the cylinder.

Now in english...........If you can't get the exhaust gas out fast enough, then you can reduce the amount of incomming gas because of the reduced space(left over exhaust) in the cylinder and in turn loose power.



Check out this exhaust size calculator.

It is just a guide but is pretty good since it figures everything out for you.

According to the calculator a 385HP engine 2.25 inch exhaust is good


http://www.mk5cortinaestate.co.uk/calculator5.php

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NYMontess


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I would say on exhaust,
Go with a set of long 1 5/8 long tube headers, 3" collector
and add a full 2 1/2 out, or dump it like you have now.

as for the other upgrades it sounds like you have it covered.

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twomanymontes


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I agree, what you got is better than mine. But Maybe try the 1.6 rockers without swaping the cam and see how it is first.

As for the headers. I like my shortys, LOL!

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intimadatorsquizz


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TURNA wrote:

While I am a fan of shorty headers for there ease of installation and maintenance I would invest in a set of long tube 1 5/8 headers and a 2.5 inch exhaust.


With a 3" exhaust and a 350 you may be to large and reduce the velocity of the exhaust gasses passing through the exhaust system. In doing so they diminish the emptying out or "scavenging" effect in the cylinder.

Now in english...........If you can't get the exhaust gas out fast enough, then you can reduce the amount of incomming gas because of the reduced space(left over exhaust) in the cylinder and in turn loose power.



Check out this exhaust size calculator.

It is just a guide but is pretty good since it figures everything out for you.

According to the calculator a 385HP engine 2.25 inch exhaust is good


http://www.mk5cortinaestate.co.uk/calculator5.php


Thanks everyone,

with this Hot Cam it should put my car around the 425-430hp range

GM actually had a ZZ430 which i just found out was my motor with the hot cam in it.

so should i still go with 2.5" or the 3"
i forgot i have a 3" xpipe system for the monte sitting in the other shed from a 85 SS

 



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I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"

intimadatorsquizz


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anyone ever heard or used these headers?



http://www.jegs.com/i/Patriot+Exhaust/737/H8047-1/10002/-1


-- Edited by intimadatorsquizz on Thursday 3rd of March 2011 08:51:23 AM

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Crusher


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NYMontess wrote:

I would say on exhaust,
Go with a set of long 1 5/8 long tube headers, 3" collector
and add a full 2 1/2 out, or dump it like you have now.

as for the other upgrades it sounds like you have it covered.


I agree.....

 



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intimadatorsquizz


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Crusher wrote:

NYMontess wrote:

I would say on exhaust,
Go with a set of long 1 5/8 long tube headers, 3" collector
and add a full 2 1/2 out, or dump it like you have now.

as for the other upgrades it sounds like you have it covered.


I agree.....

so i should just change the headers?  and leave my 2 1/2" exhaust on there for now? and i can change the exhaust and crossmember later?

 



 



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Rich_S85SS


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I agree with staying with the 2 1/2" exhaust. I also think that hot cam would be excellent for your motor. I have the Hooker long tubes and I like them, except when I have to navigate speed bumps. Then it is a slow approach and on an angle. The collectors do hang a bit low.

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intimadatorsquizz


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Rich_S85SS wrote:



I agree with staying with the 2 1/2" exhaust. I also think that hot cam would be excellent for your motor. I have the Hooker long tubes and I like them, except when I have to navigate speed bumps. Then it is a slow approach and on an angle. The collectors do hang a bit low.




don't forget Rich my car is still 4wd...lol
i'm not lowered.

i'm looking at these from summit
since they fit my heads

http://www.jegs.com/i/Patriot+Exhaust/737/H8047-1/10002/-1

 



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TURNA


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I have a set of LS Patriot heads on my father in laws Z06

Some people bash them but we have had nothing but good luck with them.

Never used there headers but they look nice and have the correct head port for your engine.

312 for a set of coated headers sounds like a decent price if there coatings are good.

Definetly go with the full 2.5 inch exhaust that exits after the rear axle.

As for an X-pipe thats up to you

What mufflers are you going to use???

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intimadatorsquizz


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i'll keep the exhaust i have on the car for now with the flowmaster mufflers. they're about 20yrs old now, but they sound good. i'll probably get another set of flowmaster muffs

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