gn1's or champion ported irons

[figga8n]

Im on a budget but want to get some new heads and need some help. gn1's or champion irons?? the motor is stock block with all bolt on upgrades. so i want to go with heads and possibly a cam.

 

[RUQWKNF]

It has been proven by a lot of racers, that out of the box, untouched GN-1s will out flow and out perform fully ported iron heads. Another advantage to the GN-1s are, you can run higher boost levels on true 93 octane and more timing without detonation due to the cooling characteristics of the aluminum heads vs the cast iron stockers. Another plus for the GN-1s are, you don't have to worry about any cracking issues like you will with stock iron heads. True there have been some leaking issues with GN-1s but there are certain things that can be done to prevent it from happening. IE: a can of K&W block seal on initial start up. I would highly recommend going with aluminum heads, whether it's a street car or strip car. There are no disadvantages to running aluminum heads on the street. Do it, and you won't regret it. Making power with these motors comes a lot easier with aluminum heads. Match them with a decent sized cam and you'll have a recipe for serious hp and a lot of grins per mile.
HTH

Patrick

P.S. Comp 218/218 with GN-1s and a TE-45a or PT67 turbo = serious street killer.

 

[figga8n]

It has been proven by a lot of racers, that out of the box, untouched GN-1s will out flow and out perform fully ported iron heads. Another advantage to the GN-1s are, you can run higher boost levels on true 93 octane and more timing without detonation due to the cooling characteristics of the aluminum heads vs the cast iron stockers. Another plus for the GN-1s are, you don't have to worry about any cracking issues like you will with stock iron heads. True there have been some leaking issues with GN-1s but there are certain things that can be done to prevent it from happening. IE: a can of K&W block seal on initial start up. I would highly recommend going with aluminum heads, whether it's a street car or strip car. There are no disadvantages to running aluminum heads on the street. Do it, and you won't regret it. Making power with these motors comes a lot easier with aluminum heads. Match them with a decent sized cam and you'll have a recipe for serious hp and a lot of grins per mile.
HTH

Patrick

P.S. Comp 218/218 with GN-1s and a TE-45a or PT67 turbo = serious street killer.

cool thanks for the input. gn1's it will be:biggrin:

 

[figga8n]

It has been proven by a lot of racers, that out of the box, untouched GN-1s will out flow and out perform fully ported iron heads. Another advantage to the GN-1s are, you can run higher boost levels on true 93 octane and more timing without detonation due to the cooling characteristics of the aluminum heads vs the cast iron stockers. Another plus for the GN-1s are, you don't have to worry about any cracking issues like you will with stock iron heads. True there have been some leaking issues with GN-1s but there are certain things that can be done to prevent it from happening. IE: a can of K&W block seal on initial start up. I would highly recommend going with aluminum heads, whether it's a street car or strip car. There are no disadvantages to running aluminum heads on the street. Do it, and you won't regret it. Making power with these motors comes a lot easier with aluminum heads. Match them with a decent sized cam and you'll have a recipe for serious hp and a lot of grins per mile.
HTH

Patrick

P.S. Comp 218/218 with GN-1s and a TE-45a or PT67 turbo = serious street killer.

whats the difference in 8 or 14 bolt??

 

[RUQWKNF]

8 bolt are for a production 109 block like you have.
14 bolt are for Stage II or a Stage 1 block that has had the extra bolt holes bored and tapped. 14 bolt won't work on a stock block.

Also, pick up a set of T&D roller rockers if you can swing it. If not, you can go with a set of Heavy Duty stock replacements by Sealed Power. Last I checked, Postons sold the Sealed Power HD replacements for around $80.00 for the pair. You will need specific hardened pushrods for the GN-1s tho. I'm sure Champion can hook you up with those tho.
HTH

Patrick

 

[SGRIM]

It has been proven by a lot of racers, that out of the box, untouched GN-1s will out flow and out perform fully ported iron heads. Another advantage to the GN-1s are, you can run higher boost levels on true 93 octane and more timing without detonation due to the cooling characteristics of the aluminum heads vs the cast iron stockers. Another plus for the GN-1s are, you don't have to worry about any cracking issues like you will with stock iron heads. True there have been some leaking issues with GN-1s but there are certain things that can be done to prevent it from happening. IE: a can of K&W block seal on initial start up. I would highly recommend going with aluminum heads, whether it's a street car or strip car. There are no disadvantages to running aluminum heads on the street. Do it, and you won't regret it. Making power with these motors comes a lot easier with aluminum heads. Match them with a decent sized cam and you'll have a recipe for serious hp and a lot of grins per mile.
HTH


Patrick

P.S. Comp 218/218 with GN-1s and a TE-45a or PT67 turbo = serious street killer.

All depends on how ports them. There is a huge cost differnce between the too. What are you goals? I got each of the three combo's. I garuntee you I got a set of Iron heads that will get down on a set of GN1's:biggrin:

 

[FHW]

14 bolt work with stock block you just dont use the extra bolt holes...I used 14 bolt for two reasons,in case i upgrade to stage and also i wanted to use the jesel style T&D roller rocker setup that can be used with the 14 bolt head.HTH

 

[Dr.drivability]

heads

14 bolt work with stock block you just dont use the extra bolt holes...I used 14 bolt for two reasons,in case i upgrade to stage and also i wanted to use the jesel style T&D roller rocker setup that can be used with the 14 bolt head.HTH

I am doing the same thing right now! 14 bolts and T&D's stuff on order, Mike says it'll work---It'll work!!

 

[Grumpy]

well you say you are on a budget... why not just use irons ??? we have a set of irons here that are not that great compared to the Champions .. ran 10.10 with them in a street beater ... I'd be more concerned with your whole combo .. 1 part is not goin to make the car fly .. just my .02's

 

[bison]

well you say you are on a budget... why not just use irons ??? we have a set of irons here that are not that great compared to the Champions .. ran 10.10 with them in a street beater ... I'd be more concerned with your whole combo .. 1 part is not goin to make the car fly .. just my .02's

I totally agree with this as the bottom end of the engine can be easily broken with a good set of iron heads. I have a decent set of iron heads on mine that i never had flowed. I doubt there would be a lot to gain switching to a set of unported GN1's though. You might want to post your budget and performance goals and we can give better info as where you should spend it to maximize performance vs. $ spent.

 

[MIB]

GN1's :biggrin: