2.7i driveability question

[slo325i]

Hey guys,

I'm right in the smack-dab middle of this project right now. I got the eta head off and I'm just prepin the i head and the intake manifold with the i injectors. I was just thinking this though....

I'm just putting on the i head w/o milling/shaving or anything like that. I understand that the compression will drop. My question is, how the motor will run/drive with low-compression? what should I look for? Is it going to taker longer to start? Loss of horsepower? any loss in driveability issues?

Justin

[Devil Inc]

My 2.7i runs fantastic, occasionally during the winter it will require an extra crank or two. Mine really screams once I hit about 3700rpm. It's no slouch down low either.

[kenika65]

Once Again!

http://www.r3vlimited.com/board/showthread.php?t=97872

[Poopie]

that car is running MS though. I would like to hear opinions on people running stock tuning.

[Edev]

My 2.7i runs fantastic, occasionally during the winter it will require an extra crank or two. Mine really screams once I hit about 3700rpm. It's no slouch down low either.

What cam did you use? My 2.7i runs flawlessly. No extra cranks. Just some of that, wob wob wob wob ;) It has a lot of get up and go, like you said.

[jmc1590]

I'm currently running an e2i with the stock 173 ECU. Early eta pistons with an 885 head. Compression estimated at ~8.3:1. It actually starts better now than it did when in "e" form. Driveability has no real issues, perhaps a slight studder when coasting under light load. Under a heavy foot, no problems. It just loves to run. And the dyno shows an increase as well.

[slo325i]

Great to know... Thanks guys!! Just got the head put on. Will adjust the valves soon... Wish me luck!

Justin

[kenika65]

Wow Didn't know their were so many 2.7i's out there!!!!!

WOOOOOT

[Luis325]

Im in the process of finishing mine also... Just forgot to get the 325i sparkplug wires.... so now its not going to be running this weekend......this sucks....

[slo325i]

Ignition parts will go in soon. Swap almost done. Just dunno where the two holes are for up top near the valve covers...

[slo325i]

She runs!!!!! so smooth!!!! Thanks for all your help R3v!!!

[MysterE30]

I have the 2.7i and it's pissed :( it bogs and doesn't give half the power it should under load. New fuel pump fuel filter and plugs. Anyone know what's going wrong? Please help me. :'(

[Devil Inc]

I have the 2.7i and it's pissed :( it bogs and doesn't give half the power it should under load. New fuel pump fuel filter and plugs. Anyone know what's going wrong? Please help me. :'(

check your O2 sensor and TPS sensor.

[slo325i]

Timing belt on well?? I must have rotated the motor at least 20 times to verify i had TDC. I was paranoid cuz i knew I wasn't to tear this motor down again just cuz i didn't set the timing right...

[MysterE30]

Hmmm. The O2 sensor is new but how would I go about checking the TPS and timing belt? (I'm also retarded. My bro is usually the one helping but he's no availibility. Just want to make sure I don't further blow things)