Toyspeed.org.nz Message Board

by **Big pun** » Fri Jun 10, 2005 3:53 pm

Ive just dropped this 4K into my KE25 and i was wondering how many HP i should expect??
Its been rebuilt with a lightend flywheel and balanced bottom end, Kelford cam, double valve springs, flat top pistons, shaved head, mild port and polish, lapped valves, honed bores etc..
twin 40mm Dellorto side draughts, redline manifold, Holley fuel regulator, ram tubes & carb socks.
the dizzy & alternator have been rebuilt, it has a new battery, leads & spark plugs.
Extractors & 2" exhaust will be going on soon...

has anyone here dynoed a 4k?
the dude i got the carbs off told me his 4k race starlet got 100hp at the wheels with these carbs, does that sound about right or is he pulling my leg?

also, are there any minor mods i can do to get a bit more power out of it?

Cheers

Website · by **Rick** » Fri Jun 10, 2005 5:02 pm

There is only one real way to tell how much power its making and that is to have it dynoed

by **Big pun** » Fri Jun 10, 2005 5:23 pm

Yeah thats the plan,
im just interested to know what other people have got out of theirs..

red car · by pc » Fri Jun 10, 2005 5:36 pm

Can I guess at 109HP ATW?

OMG so shiny! · by **Dell'Orto** » Fri Jun 10, 2005 5:42 pm

Most of the hard tuned 4k's seem to make 100ish hp at the wheels, which isnt bad for an old pushrod lump...equates to something along the lines of 130hp at the flywheel

by **RS13** » Fri Jun 10, 2005 9:46 pm

Isn't a bluetop 130hp factory? So, a massively worked 4K is the same as a standard bluetop powerwise?

AW11 Track Toy · by **Caveman** » Fri Jun 10, 2005 10:10 pm

Twincam injected 1.6 vs Pushrod 8 valve non-crossflow 1.3???

by **Lloyd** » Fri Jun 10, 2005 10:50 pm

You can get some decent go out of the K series engines, they're usually in KEs though which weigh nothing so they seem like they go as good as a 4AGE.

Completely different engines to compare though, and the 4K would be pretty lumpy compared to a factory engine made to pass emission standards and be nice to drive

by **fangsport** » Sat Jun 11, 2005 12:06 am

a built 4K should pee all over a standard 4ag . the norm seems to be around the 120-130hp ATF, but there have been bigger numbers made from these wee pushrod gems, and 150 isn't impossible.

rant all you like that a 4ag can pull 200+, but that is 20 year old Yamaha tech, not 30+ Toyota technology.

My Profile · by **Virtual Genocide** » Sat Jun 11, 2005 11:26 am

1st off i tatally agree with what you have just said fangsport, good to see everyone here isn't 4age mad.

I doubt you will make over 100hp, i would say about 80atw. Unless the kelford cam is a very high duration/lift etc and those flat top pistons give you about 11.5:1 compression.
4k's seem to run out of puff about there, you need to work on how they flow aswell, not just a porting job but possibly upright the engine or loop over manifold.

Btw my 4k has similar mods and makes 58rwkw

Have a look at my profile for a list of mods

Phil

by **Jebus** » Sat Jun 11, 2005 12:22 pm

Speaking from experience I had a 5K in my KE30 with similar mods to yours and on the dyno put out the same power as a 4AGE.

The 5k was quite fast but could only use 96+ gas, used $&#$% heaps of gas needed constant tuning and ran out of puff just after 6 grand.

Now ive installed a 4AGE, although its roughly the same power as the 5K it is a SHITload faster due to the rev range, the 4age has power from low down all the way up to 7500, so basically the 4AGE can do everything the worked K series can, but with 91 fuel, in stock form with no stress on the motor, and give reasonable mileage.

4age wins hands down in my opinion, but dont sounds as cool or as tough as a worked K series.

by **fangsport** » Sat Jun 11, 2005 7:00 pm

Mr Genocide, the hp qouted could well have been racer talk, a bit like a fishermans tale.

*My KE70* · by **solberg Fan** » Mon Jun 13, 2005 11:58 pm

Big pun wrote:has anyone here dynoed a 4k?

I have similar mods and had mine made 56Kw (about 76Hp) and 207Nm at the wheels. Only mesured to 6500 rpm but should have been done till 8000.
Im gessing if you run the standard running gear it should be even more as its lighter components.?

Hope you have fun with it!,

HRT dont you mean the starlet weighs nothing not the corolla?

by **Big pun** » Tue Jun 14, 2005 6:40 pm

Ok cheers,
yeah i dunno how much a starlet ways but my corollas light as,
should go alright im not expecting cronic power or anything, if its close to 100hp atw i'll be stoked...
soon see, i'll chuck it on the dyno in the next month or so

by **CozmoNz** » Tue Jun 14, 2005 6:44 pm

do people delete my posts?

76hp and 207nm of torque dont seem right...

got dyno chart?

My Profile · by **Virtual Genocide** » Tue Jun 14, 2005 8:06 pm

What are you implying cozmo? that the torque is to high?

IMO i would say thats about right as i stated above, my 4k with similar mods made 58kw (about 80hp) & 300Nm at the wheels and yes i do have a dyno sheet to prove that.

Phil

*My KE70* · by **solberg Fan** » Tue Jun 14, 2005 8:37 pm

CozmoNz wrote:76hp and 207nm of torque dont seem right...

got dyno chart?

yes,

Max torque and power at 6500.

AW11 Track Toy · by **Caveman** » Tue Jun 14, 2005 9:47 pm

CozmoNz wrote:do people delete my posts?

76hp and 207nm of torque dont seem right...

got dyno chart?

A lot of shit you say don't seem right...

by **Adamal** » Tue Jun 14, 2005 9:49 pm

With that kind of torque, it probably peaks early and then drops off rapidly.

by **sergei** » Tue Jun 14, 2005 9:57 pm

maybe that torque figiure is result of gear ratio ???

Toyspeed.org.nz Message Board

Worked 4K How many HP?

Worked 4K How many HP?

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