Tti headers

[metcoll]

I have a 70 charger with a 440 and rpm heads..car is floor shifted auto and has power steering, no a/c..is the 440-178 the proper part for my car...thx

[c00nhunterjoe]

If you want 1 7/8 tubes, then yes. Those will fit.

[XH29N0G]

I would think 1 7/8 tubes would be a good size for that engine unless it is really modified.  I'm sure someone will correct me if I am wrong.

[will]

I'm gonna hijack, would these be a good choice for a 595 horsepower street 440?

[c00nhunterjoe]

I would think 1 7/8 tubes would be a good size for that engine unless it is really modified.  I'm sure someone will correct me if I am wrong.

Based on the info given, we know nothing. If that is a rebuilt to "stock" bottom end with 8:1 slugs in it, then 1 7/8 are not the right choice. But we dont know anything other then its a 440 and has aluminum heads, dont even know which eddys are on it, so cant say.

[c00nhunterjoe]

I'm gonna hijack, would these be a good choice for a 595 horsepower street 440?

Most likely yes.

[metcoll]

It's a 9.5 to 10 to ne compression motor with stage one rpm heads (flow 282@600)240/250 @050 520/547 hydraulic cam rpm intake and 850 dbl.pump carb with MSD..

[c00nhunterjoe]

It's a 9.5 to 10 to ne compression motor with stage one rpm heads (flow 282@600)240/250 @050 520/547 hydraulic cam rpm intake and 850 dbl.pump carb with MSD..

What piston part number, what head gasket thickness. What is a stage 1 rpm head? Ive never seen such a thing. There are either 84cc or 88cc rpm heads. Flow at .600 means nothing with a .520 cam. What do they flow at that lift?

[metcoll]

Speed pro 2355 pistons 84cc heads..original flow ootb was 262@600 and after porting 282

[metcoll]

Sorry meant just a stage one port job

[c00nhunterjoe]

2355 is a decent budget piston. Depending on the headgasket used and how much your block was decked, 9.5:1 is most likely correct. Having aluminum heads makes it "act" like an 8:1, then we need to actually calculate your dynamic compression but need the cam card to calculate that. But essentially i can estimate that engine will be a 6.5 or 7:1 DYNAMIC compression package based on what we know about the cam. That said, the 1 7/8 is the largest i would run, 1 3/4 would not hurt it as the cam will not run high enough to benefit from the larger tubes. Imo anyway.

[Challenger340]

It's a 9.5 to 10 to ne compression motor with stage one rpm heads (flow 282@600)240/250 @050 520/547 hydraulic cam rpm intake and 850 dbl.pump carb with MSD..

IMO, this engine will be well into the downside of it's power curve past 5,500 rpm, 1 7/8" headers are plenty.

[metcoll]

actually on chassis dyno was still pulling at 5700 rpm, but we shut it down

[c00nhunterjoe]

If it was still climbing, then why shut it down at a low rpm like that?

[metcoll]

Limited dyno time and really didn't think it would keep on pulling past that..dyno sheet has been posted in earlier threads