:::RHMT::: Real Home Made Turbo

General Category => Engine Management => Topic started by: walter on February 25, 2013, 10:54:17 AM

Title: backfire at idle..
Post by: walter on February 25, 2013, 10:54:17 AM: ! Private video (http://www.youtube.com/watch?v=ruET5Ap9xmU#)

what do you think? engine is z6 vitara/eagle, ignition map at idle is set at 16.5Âº, i assume i should increase that due to low compressiont but idk if backfires will be for this. Car is not runs in the street yet.

what do you think?
Title: Re: backfire at idle..
Post by: 92CXyD on February 25, 2013, 12:06:36 PM: Did ya check your firing order?

By the way your video is private, I do not have a youtube account to look at it. :noel:
Title: Re: backfire at idle..
Post by: walter on February 25, 2013, 01:47:23 PM: yeah, everything is ok, check vid again plz. thanks!
Title: Re: backfire at idle..
Post by: Ntrain2k on February 25, 2013, 06:30:46 PM: You sure that is backfiring?

Sounds more like it might be a slight misfire to me.
Title: Re: backfire at idle..
Post by: PhilStubbs on February 25, 2013, 08:24:22 PM: what are you tuning with? crome? occasionally i get a car that does that. havent found a way to get rid of it yet
Title: Re: backfire at idle..
Post by: bigdaddyvtec on February 26, 2013, 01:42:36 AM: WHere are the afrs?
Title: Re: backfire at idle..
Post by: walter on February 26, 2013, 10:35:54 AM: Hi, engine sounds great, just sometimes it misfire/backfire.. idk if a stock base timing will cause that..

AFR is ok. 13.8-14 solid.

another video.

20130222_204732.mp4 (http://www.youtube.com/watch?v=oTNQSTTIfO8#)

thanks for replies.

P.S i know TB is to tight :noel:
Title: Re: backfire at idle..
Post by: HiProfile on February 27, 2013, 06:35:02 AM: Stock injectors or firehose?

Most large injectors won't work *perfect*. I look at it this way - if the problem is only at idle, DONT LET IT IDLE! Post ripper vids already!! :P
Title: Re: backfire at idle..
Post by: walter on February 27, 2013, 07:17:26 AM: using 550cc evo injectors.. i will do it soon!!.
Title: Re: backfire at idle..
Post by: PhilStubbs on February 27, 2013, 07:49:21 AM: I have never tuned those, but if they are anything like dsm 450's then that's your problem. I hate trying to idle dsm 450's. I always get stock idle and drivability with my tunes, but dsm injectors make me look bad
Title: Re: backfire at idle..
Post by: Speed Phreak on February 27, 2013, 10:27:35 AM: I honestly don't hear anything that sounds problematic, I've had stock cars idle worse. The g/f's SRT4 that sits in the yard is bone stock and doesn't sound that smooth at idle, I think you're fine personally.
Title: Re: backfire at idle..
Post by: PhilStubbs on February 27, 2013, 11:07:47 AM: ^^^
It's a dodge. I have never heard of more idling issues with a brand like I have dodge.
Title: Re: backfire at idle..
Post by: Speed Phreak on February 27, 2013, 11:15:04 AM: Quote from: PhilStubbs on February 27, 2013, 11:07:47 AM
^^^
It's a dodge. I have never heard of more idling issues with a brand like I have dodge.

Lol, I didn't say it was a good example.
Title: Re: backfire at idle..
Post by: HiProfile on March 01, 2013, 12:13:54 AM: They use Deka IV injectors, they aren't fantastic but better than old pintle style injectors.

Walter I'm in the process of making a whole bunch more 900cc sets, so I'll be getting you some pics soon.
Title: Re: backfire at idle..
Post by: Joseph Davis on March 05, 2013, 10:05:06 PM: Wes got 42mpg off of 500cc SRT-4 injectors in his turbo wagon. Fuck all of you.
Title: Re: backfire at idle..
Post by: HiProfile on March 06, 2013, 01:47:32 AM: I got 37mpg on my turbo EF with 780cc Deka 1's. On uberdata. The srt-4 has 8-hole caps, but nearly all others use 2 or 4 holes. Jeep guys rave about upgrading to EV6 4-hole injectors over the Deka 4's, which is a half-decade older design.