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.justin.

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Posts posted by .justin.

  5. Not Enough Fuel?

    in VHO/V-Max General

    Posted

    The .justin.... I've been waiting for you to chime in. Can you make a suggestion on the injectors that I need. Part number would be great. If not what do they need to come out of? Will 01-02 Camaro injectors work?

    01-02 camaro injectors use a different connector and are taller than your current injectors. Direct swap injectors would be 8.1L and 8.1L marine injectors. The marine injectors would be what I would suggest, as they'll be good up to about 450rwhp F/I, over 500rwhp N/A. These are they: http://www.racetronix.com/17113739.html

    I sold my set for just over $200 when I swapped up to the mototron 60s, others tend to go for around there on PT.net.

  7. Can A Locked Pcm Be Unlocked?

    in PCM Tuning

    Posted

    Well it is not a code,when the PCM is locked it is locked using your interface.Therefor only that interface can unlock it.It is not like typing in a passsword.

     

    You don't have the option with HPT to choose your own key in addition to a cable-specific key?

     

    To the OP: Any locked PCM can be unlocked if you have enough time to brute force hack it with EFILive. There are 65536 hexadecimal key permutations that you'd potentially have to go through to get it from $0000 to $ffff.

  12. Mp 112 Blower Guys/experts

    in Forced Induction and Nitrous

    Posted

    And timing cannot be compared effectively from one engine type to the next.

    As a rule of thumb, an inefficient cylinder head/combustion chamber will require more timing to produce power than a more efficient one. Same goes with a larger cylinder bore vs smaller.

     

    While I had my truck on the dyno last year, the shop owner had a turbocharged 4 cyl sandrail on the other dyno. Thing was pushing 700hp at the wheels on pump gas with 28* of timing.

  17. Something Is Broken In The Motor

    in Engine Tech And Modification

    Posted

    Comp cam has recalled all 918 springs with batch numbers listed below. Call Chris Mays at Comp Cams at 901-795-2400 extension 505 or [email protected] and they will next day updated springs. I just installed mine 3 month ago batch #049045. They will be coming out shortly.

     

    1) 49253

    2) 049045

    3) 49826

    4) 050808

    5) 051791

     

    I assume this information is printed on the box, right? I'll have to check mine out when I get them out of storage in the next few weeks.

  21. Sd Or Maf Tune?

    in PCM Tuning

    Posted

    then answer me this. why do you need to have a perfect VE then before enabling the maf? your vehicle is SD when doing all tuning and maf is there to help make for small adjustments. SD been around in racing way before maf systems. they swapped to maf systems for faster corrections to everyday driving and to aid in mods. also look at this way once a maf fails it goes into SD mode

    You don't have to have a perfect VE table. MAF is FAR more important in the final airflow calculation than the VE table is. Want proof? Go out and make a 20% adjustment to the VE table and see what happens to AFR or trims. Set that back to stock and make a 20% change to the MAF calibration. See which one has the greater impact.

  22. Sd Or Maf Tune?

    in PCM Tuning

    Posted

    well if you switched the ECU to a 2-2.5 bar configureation wouldnt it be able to accept SD?

     

    To run in boost, you'll need to do that. It still doesn't change the fact that it was never designed to be operated that way primarily. SD tuning is not difficult, just requires patience and time.

  23. Sd Or Maf Tune?

    in PCM Tuning

    Posted

    hummmm now i dont know what to do lol... i know that the diesels and ss colbalts are SD tuned and they run great. th only thing i noticed was they are harder on fuel during the winter. i have all the stuff for the SD tune. W2W recommended it but westers dosent. the MAF and SD both have advantages and disadvantages...when i had the truck tuned a while ago the maf wasnt cutting it they did some remapping but it still misses sometimes at WOT so i duno..maybe the MAF is done, also vortech has the MAF preblower..which i was told is wrong. so maybe SD (as long as it runs good) is the way to go..i duno going to have to sleep on it

     

    Diesels are a completely different animal and shouldn't really be compared. They still have a MAF sensor though.

     

    Downside to speed density is that none of the Gen-III PCMs were designed to be run in SD. Simply put, it is a fault mode. Now, that doesn't mean your truck can't run great with the MAF disabled, it just has issues to work around. One major issue will be the tendency to spike lean upon throttle transition. It's not uncommon to see AFR spike 4-5points above commanded for a moment or two.

     

    MAF's biggest issue is its limits imposed by the PCM.

  24. Sd Or Maf Tune?

    in PCM Tuning

    Posted

    So, with that said, a stock MAF would be a no but aftermarket such as the LPE 100mm MAF than that is an option.

     

    The MAF itself isn't the problem, it's the PCMs limitation in the MAF calibration that is the problem. 512g/sec (67lb/min of air) is the maximum value that the PCM is capable of storing for a given MAF frequency. With a marginal flowing setup, a 408 with 14-15psi of boost would be at that limit at just over 4000rpms.

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