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backfiring through carb and exhaust??

Started this discussion. Last reply by Anthony Nov 21, 2014. 5 Replies

z24 cracked block

Started this discussion. Last reply by TigerRacing Nov 15, 2011. 41 Replies

 

plumcrazy2's Page

Latest Activity

Anthony replied to plumcrazy2's discussion backfiring through carb and exhaust??
"what mpg are you getting with the holley. Im debating on getting one instead of a weber"
Nov 21, 2014
natanael gonzalez aragon perez replied to plumcrazy2's discussion bfg baja t/a (different tread) in the group 720 Offroad
"look ..this baja t/a only in 33x10.5 no more small"
Jul 24, 2013
Poopypants replied to plumcrazy2's discussion bfg baja t/a (different tread) in the group 720 Offroad
"those are their all terrain tires and they work fine, but don't expect to be able to hit any mud or do significant rock crawling with those tires. If your on dry dirt roads or in the snow the bfg at's work great and will wear well past 70k…"
Sep 5, 2012
TigerRacing replied to plumcrazy2's discussion z24 cracked block
"Found some info on these motor mounts, original PN 11220-46W00.  They look to be available here... (although EXPENSIVE) http://www.nissanpartszone.com/components/1981-nissan-720-pickup_engine-transmission-mounting-112-339.html At the very least…"
Nov 15, 2011
billy martin replied to plumcrazy2's discussion z24 cracked block
"i have two z24 blocks and neither one of them are cracked"
Nov 2, 2011
Patrick Smith replied to plumcrazy2's discussion z24 cracked block
"you know, as far as dishing is concerned, I'd have to say it must be the same as the prior piston.  I've had an early and late Z22 apart at different times and the dish looked the same (but I didn't cc them to be sure.)…"
Nov 2, 2011
datzenmike replied to plumcrazy2's discussion z24 cracked block
"Yeah I caught that on P #3. You know that I know that you know what's right.   My Nissan info shows only one piston type and rod length for the 720. However, there are two different pistons and rods used on the only other vehicle to have…"
Oct 30, 2011
Patrick Smith replied to plumcrazy2's discussion z24 cracked block
"I luckily haven't needed a passenger motor mount, but if I remember they simply don't exist in the parts catalogs by vehicle.  They do however exist, but you need to go to a parts store and look at the paper catalogs with the picture…"
Oct 30, 2011
Patrick Smith replied to plumcrazy2's discussion z24 cracked block
"ok, i made a mistake.  up above I said   "From the best knowledge I have, the Z24 was derived from this block by casting the crankcase larger to accomodate the larger crank and raising the deck.  The BIG change is in the piston,…"
Oct 30, 2011
TigerRacing replied to plumcrazy2's discussion z24 cracked block
"Lol, that's what I did James.  But, I'm looking at possible buying another 82 for the street, and it needs both mounts :)"
Oct 28, 2011
plumcrazy2 replied to plumcrazy2's discussion z24 cracked block
"corey don`t worry about it it`s only  a race truck bolt it in solid, that`s all i do james"
Oct 28, 2011
TigerRacing replied to plumcrazy2's discussion z24 cracked block
"Patrick, I think you might be able to answer this, or maybe Mike, but what is different about the 81-82 4wd right side motor mount which makes it hard, if not impossible, to find??? Even RockAuto carries no right side mounts for the 81-82 4wd…"
Oct 27, 2011
TigerRacing replied to plumcrazy2's discussion z24 cracked block
"Lol, still planning on dropping by one of these days Patrick!!!  "
Aug 5, 2011
TigerRacing replied to plumcrazy2's discussion z24 cracked block
"Wow some great information here, but now I think about it we should start a discussion specifically for this topic so we can continue to comment on it as we think through and verify some of this information.  I believe the Z22 block currently…"
Aug 5, 2011
datzenmike replied to plumcrazy2's discussion z24 cracked block
"The Z22E in the 200sx used the same rod and piston as the truck Z22 until 12 '8. This Z22 rod was identical to the earlier L20B... the same. Starting in Jan of '82 the rod was lengthened from 145.9mm to 149.5mm and the pin to piston top…"
Aug 5, 2011
Patrick Smith replied to plumcrazy2's discussion z24 cracked block
"If any body wants to drop by I have a bunch of Z22 stuff you could look at and see differences.  I'm getting rid of my Z24 crap and sticking with the Z22 and the KA24 from here out"
Aug 5, 2011

Profile Information

What is your profession? (not required, just if you want to share your knowledge)
michelin tire
About Me:
i know not nissan but powered by nissan(fastest sidekick around).i`ve been racing this rig a couple years with the napz engine in it
How many 720's or other Nissan trucks do you own? What years and types?
none at moment have had or drove about 5 over years
What modifications have you done to your truck(s)
motor is 40 over with flat tops ( out of 89 240 sx)
292 web cam
ported and polished,3 angle valve job
holley 2300 carb, 350 cfm(with one inch spacer plus nitrous plate)
big big shot of nitrous( between 60 and 120hp depending what i`m doing)
header and staight pipe for exhaust
31x10.5 15"bfg mud terrain front
31x13.00 15"bfg mud terrian on rear and welded diff
How many miles would you travel to attend an all 720 truck meet?
50

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Plumcrazy2's Blog

z24 block cracks

Posted on January 19, 2010 at 12:51pm 2 Comments

anybody ever here of the z24 block cracking from waterjacket to the head bolt holes and will this hurt them? i`ve found 7 on race block with just my eye after block decked and 2 or 3 on two other blocks i`ve checked since one with naked eye other with magnaflux.any suggests or comments appriecated
james

Comment Wall (37 comments)

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At 11:37pm on February 15, 2009, datzenmike said…
The rotor directs the intake and the exhaust spark to intake #1 and exhaust #1 and they fire together. Then rotates counter clockwise skipping the next terminals and lines up with intake #3 and exhaust #3, skips the next one and fires In. #4 and Ex. #4 and finally In. #2 and Ex. #2. The firing order is 1 3 4 2.
At 2:06pm on January 9, 2009, TigerRacing said…
Sorry, that is Taylor, not Jacobs, brain fart...
At 2:05pm on January 9, 2009, TigerRacing said…
My plugs wires are Jacobs 8mm Spiro-Pro (straight boot). They are great and have lasted many, many years. The plug ends are silicone and molded on, you cut/crimp length at the cap end to adjust lenth. I just used a universal V8 set and cut them to length. All you need is a cheap plug wire crimp tool available at most part stores.

http://store.summitracing.com/egnsearch.asp?N=700+400235+301889+4294891681+4294908395+4294920241+115+4294851167&autoview=sku
At 7:50pm on November 17, 2008, TigerRacing said…
This is a fixed step type, I think adjustable in 3 degree steps, but cheaper than the fully adjustable type.
http://www.zccjdm.com/catalog.php/azcarbum/dt43033/pd858308/KAMEARI__8_HOLE_ADJ._CAM_GEAR_
At 12:34am on November 17, 2008, Alicto said…
I had a 292 before in my truck And it did pretty good @ 6500 rpm. To me I think the 292 web cam had really good bottom end. But 300 and 310 web cams have some wicked top end. I am running a Z22 w/ 300 web cam, mikuni 44's, pacesetter headers, and MSD blaster 2 coils. Everything else is stock and my truck does its best at 6500 to 7000 rpms.
At 12:26am on November 17, 2008, Alicto said…
I am running the stock Z22 pistons. My Dad has a 89 Hardbody though w/ a 300 Web cam and KA24 pistons and his truck revs up to about 7500 rpms. But we shift @ 7200 rpm.
At 2:48pm on November 14, 2008, TigerRacing said…


This is the one I designed, differs from ratdats in that my adjustment screws come in from the rear, that way I don't have to bore as big a hole through the gear for the hub to fit through and the main bolt will sandwhich the gear and hub together rather than just the hub. I'll only use four screws, datrats old design used four, now they use eight. I think they had problems with the gear working loose from the hub, and that's why they pulled it off the website for a while, then it came back on with eight screws... My biggest problem with my design is clearing the cam tower ends behind the gear. I plan on putting in countersinked areas for the screws to tighten in to in order to have the clearance I need...
At 7:23am on November 12, 2008, Alicto said…
Your welcome. If you have any questions feal free to ask. I used to run a bigger cam in my truck though on stock valve springs. I had a Crower 318. It had like a .515 lift. Then I had a 310 Web Cam. It has a .503 lift w/ 280 .050 duration.
At 7:32am on November 11, 2008, plumcrazy2 said…
what exactly am i looking for other than dyno and g-tech readings different unless dyno was with smaller dyno.or the feul mamagement system
At 12:29am on November 11, 2008, TigerRacing said…
.503 is a lot of lift for stock springs, I'd be really afraid of valve float at high rpms..

hey found this today, same guy you pointed me to on cardomain
At 7:27pm on November 10, 2008, Alicto said…
You can just use stock springs. I am running a 300 Web Cam on my truck w/ stock valves and valve springs. Nothing needs to be done to the head. I have a stock head Z24 w/ a 300 webcam. The specs on the 300 webcam is .503 lift and 260 .050 duration.
At 9:24pm on November 8, 2008, TigerRacing said…
Yeah, and turning too fast can even result in pulling the side out of the aluminum diff housing on those. I might not happen to you, just a heads up so if it happens, you know why...
At 9:13pm on November 8, 2008, TigerRacing said…
I head ya... Not sure when I could spend that much either.
At 9:00pm on November 8, 2008, TigerRacing said…
Well, I know what you mean, but with that cam gear you can tweak your cam timing to bring your peak power band up or down. Cheaper than buying several cams... You can adjust power band up for a wide open track, down for a tight track. It is expensive, but then again, everything is expensive when it comes to racing.
At 12:55pm on November 8, 2008, TigerRacing said…
Hey bud, in case you're interested, DatRat.com has the adjustable L series cam sprocket for sale again, they had discontinued them some time back, these work on the Z24 as well. This allows you to shave head/deck height and still degree the cam back in...
http://www.datrats.com.au/
At 6:46pm on November 7, 2008, TigerRacing said…
Holy crap, found him. Looks like he found a Z18e turbo setup, those are hard to find... bolt right onto a Z22/24. Love to find one myself.
At 6:37pm on November 7, 2008, TigerRacing said…
Thanks Bud! Uploaded some pics of my '86 that I rolled back in 2005... I'm rebuilding that one now with a custom long travel a-arm setup, that's where the new motor was going, but thinking of stuffing an Infinity 5.6L in it instead and putting a Ford 9in in back lol...
At 4:03pm on November 7, 2008, TigerRacing said…
did your computer crash, or did I talk you out yesterday lol?
At 7:39pm on November 6, 2008, TigerRacing said…
Can you point me to the pink turbo beast? Can't seem to find him!
At 6:45pm on November 6, 2008, TigerRacing said…
Saturn? Really? How did he figure that one out! Does it require any modifications? Drops in every hole? I haven't caught up to him yet, I'll have to check his truck and page out. So many people have joined it's hard to keep up.
 
 
 

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