j par
Well-hung Member
Insert Jeopardy theme song........
I can imagine this taking more than 15 minutes for a pro like you with all the correct tools...
My home inspection of Speedmaster heads
- Thread starter 318willrun
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I can imagine this taking more than 15 minutes for a pro like you with all the correct tools...
Ya but I only work five minutes a day. Lol. Gotta get my 1.5-2 mile walk in everyday, nap, shower, two hours of hand washing, last night my Wednesday night church community group met online (Zoom) watch a movie with my son, eat (5 hours) cook, play with cats, and clean house.
j par
Well-hung Member
j par
Well-hung Member
I see no time calculated in there for wasting time on this Forum..
..That's 30 seconds of my live, i will never get back.
Guys it’s looking like at least a day or two more before I can get to this. As you probably know I got some issues going on myself with pushrod clearancing but as soon as I get this addressed I will get some cc numbers.
I've got a new 100ml burette on order, and I've got one of my bare heads in the car so I can build a stand for the head. Not to deter you, I'd like to know if there's a difference between the cast/ported heads (don't think there will be). Hoping to have numbers this weekend myself.
j par
Well-hung Member
Sorry for the holdup but if I have to get this figured out. Lord willing maybe we will race sooner or later this year.
I've been following your build thread, gotta get that rocker issue sorted first. I need to get back to scat about what pistons I want, so I've got an incentive to get the data asap.
PRH
Well-Known Member
GLH’s heads have had the seats recut....... so the volume would be slightly bigger than they were “ootb”.
I would only use published data, or other people’s measurements for “guesstimating”.
The only way to know what your heads actually measure ....... is to check it.
I would only use published data, or other people’s measurements for “guesstimating”.
The only way to know what your heads actually measure ....... is to check it.
I found a syringe. now if I could find the plate. Do I have any spark plugs? Next problem. LOLDamn, I was going to measure mine but I can't find my cc plate. I don't think I have a syringe anymore either.
j par
Well-hung Member
You should have put your blindfold on and had this done already LOL...
cc gauge on pole. Small bit of grease should work around the chamber should work on the plate.
Edit: pic, something real quick to grab the 3/4" pole and the 15mm tube.
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j par
Well-hung Member
Got one chamber done tonight, going to do two in each head total.
64.5cc with a little air trapped by the exhaust valve. Head is level, but I need to bias it a bit towards the vent hole.
Pretty much lines up with the 65cc I was expecting,
64.5cc with a little air trapped by the exhaust valve. Head is level, but I need to bias it a bit towards the vent hole.
Pretty much lines up with the 65cc I was expecting,
Are you planning on relieving the spark plug hole like some of us did
I was doing some research on an extended reach plug before things got crazy. I need to finish my search and figure out if I can find one that will work, or if I need to clean the hole up. Thanks for the reminder.
Bosch has's some pretty detailed info about their plug numbering system. The one I found has a standard length electrode, and a .875 reach (vs .750). It fits a 2.4l Nissan from the 80/90's, but it's discontinued (PN 7925). I used that to cross search and found a compatible plug. Standard reach, but with an extended electrode.
It's a standard 14mm, flat seat, .750 reach plug. But it has an electrode that is 7mm vs 4mm. That's an extra .118 of protrusion.
I haven't picked one up yet, but I have to go out today anyways, so I'm going to try and grab a test plug and I'll post pictures/results later.
Bosch Number - 6721 / FR8HPP30X
Champion - RC12MC-4
Neverlight - 5224
NISSAN 240SX 1989 - 1990 2.4L
NISSAN AXXESS 1990 24L
NISSAN D21 PICKUP 1990 - 1994 2.4L
NISSAN PICKUP 1995 - 1997 2.4L
NISSAN STANZA 1990 - 1992 2.4L
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