a 7afe's true power.. ? Options

[macavely]

Ok just wanted to talk about something that has been on my mind. well they other night i'm on my way to my girls house and i pull up to an interga at the light. its a 94 + gs was on the back.. i look over and there is this guy with his girl in there.. she keeps she looks over and smiles. then the guy looks over at me with this hard look. and revs his engine. damn thing sounds like a lawn mower. so the light turns green and were off i'm like half a car infront of him i her hes coffe can get louder.. as i pull away.. mind you i never floor it and my rpms never went past 4thousand..we get to the next light and he pulls away and i get behind him to make the left turn to get on my girls street. well since that day i have been thinking has anyone on here really tested out how much power you can get out of a 7afe.. the corolla guys seam to love there 7afe engine.. and i have had some corolla dust me on the turnpike.. everyone talks swap well how about getting a new 7afe engine and popping a turbo on it and inter cooler and seeing how much power you can get out of it.. .. cause i don't belive that you can't get a 7afe up to 300hp like my pops told me once and engine is an engine how much work do you want to do to it..

[97sccelica]

the one thing that makes the 7afe better than the 5sfe is the fact that is has a lower CR making it more boost friendly.

with a well setup turbo system, you can go to about 200hp from the 7afe without straining the engine too much

the 7afe also, while it does have low power, has all its power in the right places. the max tq is somewhere around 2000rpm and max hp is hig in the rpm range. i think.

"The Celica had a busy weekend. On Friday, we dyno'ed the new engine, which now has a whopping 1100 miles on it. It showed us 95.3 horsepower at the front wheels. This is up just 4 horsepower from the previous baseline (pre-engine rebuild at 91.3). Our thinking is that the engine was running well, with loose bearing clearances before the rod bearing spun, so a stock rebuild wouldn't be a major source of horsepower."

"The first pull on Friday showed power at 92.4 horsepower with a stock air filter and stock exhaust system. (1.1 more than pre-rebuild). Looking over our notes, we noticed that the last pre-rebuild dyno run was with a K&N drop-in air filter and the ECU recently reset. We popped the K&N air filter in for the second run, which yielded 93.7 horsepower, with a consistent gain from 4000 rpm on up. The ECU's fuse was then pulled for approximately 30 seconds and the car was run again, this time showing 95.3 horsepower and 103.6 lb.-ft. of torque."

that comes from http://www.grmotorsports.com/celicast.html

the car they have is a 5spd ST and the baseline dyno was done at 160k miles

i think that the main limiting factor with the 7afe and 5sfe engines are the economy heads. there is no practical way around that. a head swap almost costs as much as an engine swap and porting and polishing the head wont help too much.

but yes, an engine is an engine. it just depends on how determined the owner is.

[DustyBurns30]

I am going to rebuild my 7a-fe with forged rods and pistons, and have the head ported and polished, then im going to try to get a decent performance cam and sprockets, lightweight pulleys, CAI, header and exhaust, and finnaly a turbo.

when i am finnished i will take over and get it dynoed and let you guys know what i find out, of coarse mac knows that im on a quest for the connecting rods and tranny but once thats sorted its rebuild time.

DB

[SpedToe169]

Just about any engine can make big power. The reason that the engines to have work so well and are so easy to mod to big power levels is because the development has already been done on them. Engine development is VERY expensive when it has to be done from scratch. Its probably theoretically possible to get 1000hp out of a 7a-fe but there would be virtually nothing stock left. Its debateable at which point it stops being a 7a-fe and becomes a totally different beast. I've seen a stock block/stock crank 1.8l honda make 1000hp at the wheels. The block casting, the crank forging, and the head casting were the only stock parts remaining on the engine. The same could be done with a 7a...or virtually any other engine with enough money. The problem is that as power increases linearly, cost increases exponentially. It wouldn't really cost that much to get 300hp out of a 7a (easily done for under 10k) but to get 500 or more would cost a LOT more (say $40k?).

I totally believe that there are people on this board with enough money and know-how to make 300hp out of a 7a. I have the knowledge, but not the money right now.

As was stated before, 200-225hp is possible on a solid stock bottom end.

[Hanyo]

How much horse would a bolt on turbo make on the 7A engine with EVERYTHING else stock?

[macavely]