Big Wang Bandit said:
I was in another thread where everyone was saying that a 1.5JZ is a 2jz with a worse flowing head. So which one is it? Does the 2J head flow better, or the 1J?
Which motor?
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I was in another thread where everyone was saying that a 1.5JZ is a 2jz with a worse flowing head. So which one is it? Does the 2J head flow better, or the 1J?
Grimsta said:
Other way around, Ace.
1.5JZ = 2JZ block + 1JZ head.
The 1JZ head was designed by Yamaha iirc. And yeah, it flows better. Of course, with a bit of work the 2JZ head flows every bit as good. The only reason a 1.5JZ should ever exist is if you screw up the 1JZ block.
Yup... Im just now converting to the 1JZ!:biglaugh:
speakin of Yamaha, my 1J doesnt even say "1JZGTE" it only says Yamaha, does that mean it came out of a soarer or somethin???
How can i tell if it's a supra 1J???
Front sump, Harness ect.... What do i look 4???
speakin of Yamaha, my 1J doesnt even say "1JZGTE" it only says Yamaha, does that mean it came out of a soarer or somethin???
How can i tell if it's a supra 1J???
Front sump, Harness ect.... What do i look 4???
Yeah, i know the 1.5 is a 2J block w/ 1J head, but in another thread where /\/\ 1JoeZee was talking about how to classify the 1.5 others were saying its basically a 2JZ with a worse flowing head. So then in all actuallity THEY are mistaken and the 1J head actually flows more than the 2J head then?
I think there was a thread a while back between the flow on both heads. I think the differences were minimal and where one was good the other was good elsewhere or something. kinda talking out of my ass.. but I think thats how it was lol.
if you have a supra you already know that the 7m has torque so what you need to do is go out and find someone who will let you drive there 1j supra so you can figure out whichengine suits your driving style the best
themadhatter said:
Good idea, anyone willing to let me have a crack at their 1J? I plan to go 2J, just wanted to clear up any mis-info on the head flowing
"The 1JZ head was designed by Yamaha iirc. And yeah, it flows better. Of course, with a bit of work the 2JZ head flows every bit as good. The only reason a 1.5JZ should ever exist is if you screw up the 1JZ block."
Mis-informationa alert.. 2JZ intake-236cfm 1JZ intake-215cfm at .4 lift.. The exhaust side has even a greater disparity. 7M flows around 200cfm intake
Neather of these heads is very good (unported) compared to many newer engines.
Mis-informationa alert.. 2JZ intake-236cfm 1JZ intake-215cfm at .4 lift.. The exhaust side has even a greater disparity. 7M flows around 200cfm intake
Neather of these heads is very good (unported) compared to many newer engines.
MRSUPRA said:
Especially when you take into account you can get 400CFM out of LS7 heads with minor porting and they flow ~372cfm stock. All @ 28" of water.
Our heads are good for our engines however, since we are working with turbo'd setups and such small displacements, when you can get 300cfm, (ported) or very close to it, with usable lift it works.
I think the rule of thumb they thought us at the school I went to was roughly 250cfm for every 500HP you want to make. Or it roughly requires 250cfm to make 500HP when talking about N/A stuff.
Taking that into account, our Mustang motor made 900 to the flywheel N/A and it's heads flowed a little over 400cfm, revved to 9600 going through the traps and was just a hair under 400cid. So if we could have run better heads (We run the car in a class and are limited to what cyl. heads we can run.) that we could have gotten 500cfm out of then over 1000HP would have been easy. Also NHRA Pro Stock heads, winning ones at least and in the 650cfm range, and I think they are making ~1600HP with 11K RPM 500 CID big blocks.
Heads are fun!!:icon_mrgr
Sorry end OT/thread jack.
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Also NHRA Pro Stock heads, winning ones at least and in the 650cfm range, and I think they are making ~1600HP with 11K RPM 500 CID big blocks.
Heads are fun!!:icon_mrgr
Sorry end OT/thread jack.[/QUOTE]
2jz can make that power, on a little 3.4 liter stroker. and big ass turbo. no need for huge unheard of displacement, 500 cid :aigo: . :biglaugh:
Heads are fun!!:icon_mrgr
Sorry end OT/thread jack.[/QUOTE]
2jz can make that power, on a little 3.4 liter stroker. and big ass turbo. no need for huge unheard of displacement, 500 cid :aigo: . :biglaugh:
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