i tried searching with "ls vtec p28" and "ls vtec ecu" but i get alot of **** with just 'vtec' and such so im just gonna ask and hopefully get a straight answer.

can i run my ls vtec built with gsr head and low comp(9.5:1) pistons, with a normal p28. or would it be a risky deal. i have a chipped p28 thats for the motor but i just need to find time to get it from the guy who bought the car my friend left it in.

 

do not run a stock p28 on a lsvtec

 

well the car will start and run but it wont run as strong. i suggest the chipped p28 but the motor will start and run sluggish with the stock p28

 

i ran a virgin p28 on an lsvtec to break it in for the first lil while before i boosted it. the motor had fine compresson and pulled like hell for what it was

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by insult master &raquo;</TD></TR><TR><TD CLASS="quote">can i run my ls vtec built with gsr head and low comp(9.5:1) pistons, with a normal p28. or would it be a risky deal. i have a chipped p28 thats for the motor but i just need to find time to get it from the guy who bought the car my friend left it in. </TD></TR></TABLE>

9.5:1 is a safe compression for a ls/vtec setup, but running a ecu from a 1.6L engine to a 1.8L engine isn't the best to do as a permanent resolution. To turn on the car and break it in slowly, it will work but you want to consider getting a tuner to tune the car and give you a good base map to run on and fine-tune the engine with the fuel maps and a/f ratio.

 

Running the p28 to break in the motor would probably be fine, however; I suggest not to use the ecu because of the different fuel setups, but if you are planning on riding hard......save it for the up grade ecu.

Anyway... ls/vtec setups tends to have loose rod bolts because the block was not made to handle the higher rpm.........so I suggest you use ARP bolts on the rods just to stay on the safe side. The cylinder compression should be good for the engine with the 9 compression since the ls/vtec should bump the compression up a little

Modified by forestboys at 2:55 PM 8/11/2006


Modified by forestboys at 3:05 PM 8/11/2006

 

ive already got eagle rods with the arp's for it. i just want the motor to run for now till i can get my turbo **** situated so i can just tune it once. it would hopefully only be for a very short time and i wouldnt drive it hard.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by insult master &raquo;</TD></TR><TR><TD CLASS="quote">ive already got eagle rods with the arp's for it. i just want the motor to run for now till i can get my turbo **** situated so i can just tune it once. it would hopefully only be for a very short time and i wouldnt drive it hard.</TD></TR></TABLE>

it's simple...DRIVE THE CAR NORMAL. I've done it tons of times. I have a fully biult Lsvtec and I never took my charge pipe off or anything silly like that. just drive it normal until you a re ready to tune.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by forestboys &raquo;</TD></TR><TR><TD CLASS="quote">Running the p28 to break in the motor would probably be fine, however; I suggest not to use the ecu because of the different fuel setups, but if you are planning on riding hard......save it for the up grade ecu.

Anyway... ls/vtec setups tends to have loose rod bolts because the block was not made to handle the higher rpm.........so I suggest you use ARP bolts on the rods just to stay on the safe side. The cylinder compression should be good for the engine with the 9 compression since the ls/vtec should bump the compression up a little </TD></TR></TABLE>

he didn't ask about rod bolts. just driving. and it's not the block that can't handle it. it's just the rods bolts, the stock ones streach.