Detonation on JEs..

The place for all technical car discussions. If you haven't already, read our Disclaimer first!

Moderator: The Mod Squad

Detonation on JEs..

Postby Boosted_162 » Fri Jul 06, 2007 10:15 pm

Hey guys.

Just browsing trademe (as you do :lol:). Now theres a set of JEs on there, pretty cheap as well. Now theres some marking from detonation on one of the pistons, would this affect it at all? Ive decided to build up myself a new motor.

Cheers. Heres a pic to help explain. Bad photo, but you can see the marks on there.

Image
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa

Postby rollaholic » Fri Jul 06, 2007 11:08 pm

didnt you just get done installing a new motor? :P
BASU!
User avatar
rollaholic
Toyspeed Member
 
Posts: 5383
Joined: Fri May 28, 2004 2:19 am
Location: West is Best

Postby Boosted_162 » Fri Jul 06, 2007 11:22 pm

Well....yeah :P. The motor i just put in only standard tho, and im not certain of its history. I know the last owner, but before that is a mystery. I have to pull mine out in the future anyway, so i thought id build a new one thats gunna last, forged internals and new bearings etc. The motor in there now was a spare one anyway, so ill run it on that until i build up another new motor :lol:
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa

Postby Akane » Fri Jul 06, 2007 11:32 pm

You know I have a set of JE's which I'd let go for cheap, if you can ever recover them from vvega......
No "stance", no "hellaflush", none of that bullshit. Nothing but no grip on full boost.
http://www.lol.co.nz/ random shit.
User avatar
Akane
Toyspeed Member
 
Posts: 4073
Joined: Tue May 14, 2002 2:08 am
Location: Auckland

Postby Boosted_162 » Fri Jul 06, 2007 11:39 pm

Akane wrote:You know I have a set of JE's which I'd let go for cheap, if you can ever recover them from vvega......


Interesting... are they in a motor or something? Might have to talk to him about it. Maybe go call in next time im down :lol:
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa

Postby Akane » Sat Jul 07, 2007 3:03 pm

I'll PM ya
No "stance", no "hellaflush", none of that bullshit. Nothing but no grip on full boost.
http://www.lol.co.nz/ random shit.
User avatar
Akane
Toyspeed Member
 
Posts: 4073
Joined: Tue May 14, 2002 2:08 am
Location: Auckland

Postby RedMist » Sat Jul 07, 2007 3:36 pm

Probably the reason I cant see the detonation is because the pic is of the pistons when they are new.. ie never fired, no detonation.

This is the pic of the piston with detonation.

Image

Its hard to make out, but it doesnt look terminal for that piston.
The answer is Helmholtz!

Toyota ST185 Celica Rally.
Toyota ST205 Celica Rally.
Jimco/ Cosworth 350z Offroader - 609whp at 16psi
User avatar
RedMist
Old Skool User!
 
Posts: 3078
Joined: Tue May 21, 2002 12:39 pm
Location: Christchurch

Postby Boosted_162 » Sat Jul 07, 2007 4:55 pm

Good spotting there, i didnt look too hard at the picture i posted, it looked like there was a mark on no. 1, but its a crap photo anyway. Looking at it now tho i realise the pistons were way too clean!!

So you reckon there'd be no problems with it? Or is it one of those things to steer clear of?
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa

Postby IH8TEC » Sat Jul 07, 2007 4:57 pm

get a better picture of them, not of when they were new
Current Rides: 1994 Hiace Custom
KTM 250sx

Previous Car: 1988 Toyota Levin 4agte
234kw atw and 12.5@183kmh
Sold to a muppit who wrecked it
Hmm
User avatar
IH8TEC
Toyspeed Member
 
Posts: 3128
Joined: Wed Nov 26, 2003 7:11 pm

Postby Boosted_162 » Sat Jul 07, 2007 5:03 pm

Ive asked on the auction for a clearer pic, we'll see if he puts up a new picture :)
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa

Postby atmosports » Sat Jul 07, 2007 6:15 pm

If you can go & look at them in person, or get someone you trust to go & look at them. I'd also insist on getting them crack tested or something along those lines before buying also if you can just to make sure. But then it's not really stupid money to buy a new set anyway & it's cheap insurance. Have a good look around the gudgeon bosses as that is the area where JE's generally will fail in turbo applications.
atmosports
Toyspeed Member
 
Posts: 569
Joined: Fri Jul 04, 2003 7:52 pm
Location: Auckland,New Zealand

Postby Boosted_162 » Sat Jul 07, 2007 6:59 pm

atmosports wrote:If you can go & look at them in person, or get someone you trust to go & look at them. I'd also insist on getting them crack tested or something along those lines before buying also if you can just to make sure. But then it's not really stupid money to buy a new set anyway & it's cheap insurance. Have a good look around the gudgeon bosses as that is the area where JE's generally will fail in turbo applications.


Yeah, the last thing im wanting is one to fail and exit the block in a spectacular fashion! And being at the other end of the country doesn't really help! Might see if i can get ahold of Kenny's ones, otherwise i might just save for new ones :)

Cheers for your help.
Current:
1996 KZN185 Hilux Surf
2008 Mazda2
Boosted_162
Toyspeed Member
 
Posts: 3624
Joined: Sun Sep 04, 2005 1:02 am
Location: Kaukapakapa


Return to Tech Questions

Who is online

Users browsing this forum: No registered users and 16 guests