CHI 218cc 3V heads the verdict (not Engine Masters) - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

brenx · 10-30-2003, 01:39

Bloody awesome! The engine has gained in all area's. It doesn't even behave like it used to with the 2V's.

Verdict = Get some, I recommend them.

Brenden

qwikcorty · 10-30-2003, 01:49

so worth spending the $$ on then?

brenx · 10-30-2003, 02:03

HELL YES!

Well worth the $ and stuffing around.

I've still got some more stuffing around to do as I have a compression issue. I think it's leaking compression into the cooling system.

I run 11.2:1 compresion on 98 octane fuel with no pinging!

Brenden

Fat F100 · 10-30-2003, 02:11

Sounds good Brendan, & thanx for the info on the other thread re: AFD 2V heads.
Is your engine more torquey down low with the new heads?
I have heavily modified 2V's with a Crane F260 cam & am quite disappointed with the lack of torque down low. Top end is great, it's like driving a 2 stroke 351, but I'm thinking that this has alot to do with the cam I've got.
By the way, who did you get to set up your ignition for the 11.2:1 comp?

Dave.

brenx · 10-30-2003, 02:21

Quote:

Originally Posted by Fat F100

Sounds good Brendan, & thanx for the info on the other thread re: AFD 2V heads.
Is your engine more torquey down low with the new heads?
I have heavily modified 2V's with a Crane F260 cam & am quite disappointed with the lack of torque down low. Top end is great, it's like driving a 2 stroke 351, but I'm thinking that this has alot to do with the cam I've got.

Dave.

Depends on what you mean by down low. My down low due to the new highstall is 4500rpm. It just slingshots stupidly quick. I run a F246 copy.

The extra torque/hp/drivability/better engine behavior, I couldn't think of anything nicer. I can't believe I even bothered with 2V's now.

Have you got a manual or auto? That cam would really come alive about 5500-6000rpm.

The higher end Crane cam's (bigger than F246) don't really have a good reputation. The main ones are the F238 and F246.

My cam came alive at 4000-4500 even though advertised was 3800. I think the heads where choking it.

Brenden

xacoupe · 10-30-2003, 02:35

you dynoed it yet brenden??
would be good to see a before and after graph

DansEdgli · 10-30-2003, 02:38

What does your clevo rev to?

Fat F100 · 10-30-2003, 03:03

Yeah, the cam kicks in at about 4500 & i've seen 7000, though it seemed a little strangled that high. The cam is advertised to be good from 4400 - 7200.
My heads are supposedly flowed for 640hp, but they make the compression 11.5:1 so it's no good on PULP. I have double head gaskets to drop comp to about 10.5:1 & IC&E regraphed the dizzy for this new comp. I feel that it could run more efficiently, though.
I'm also running a 750 vac/sec carby, & I've been told that it may be too big (?) & that I should probably run a 650 D/P.
It is a C6 auto with 2900rpm Eliminator convertor for drivability, as it is in a 2 tonne F100. I wouldn't really want to have a 4500rpm stally in it as it would be screaming it's nuts off everywhere. At the moment I am pulling 3200rpm at 120kph on the freeway & power is just a bang on the shifter away. I'm also running 3.5:1 gearing which I will be changing to 3.9:1 when I get a chance.
The only solutions I've come up with are:
(1) change the pistons to lower comp dish tops, put single head gaskets back in, change the cam & regraph the dizzy again for this, or
(2) try to open up the chambers in the heads a little more to lower the comp for PULP & maybe run a 2V Funellweb III intake manifold with dizzy regraph to suit, or
(3) CHI 3V's & a cam change.
Oh, maybe a 406ci stroker or a blower, but I'm not that rich.
I'm no mechanic & I'm learning more about what goes with what everyday. I was kind of lucky to get this engine with all the good stuff for the price, I just think that maybe it's not as practical as it should be & if i can make it better I will.

Dave.

brenx · 10-30-2003, 04:49

Quote:

Originally Posted by xacoupe

you dynoed it yet brenden??
would be good to see a before and after graph

Thats yet to come. Have to stop the compression leaking into the cooling system first.

DansEdgli : Most it's ever rev'd to was 8500rpm. Believe me it'll never do it again. It was just a lets see how strong it is experiement.

Guess what? It's strong. 20,000k's later it still looks like new even after tonnes of racing.

FATF100: If you can borrow a 750dp? Try it. Personally I don't believe a 650dp can flow the sort of power and petrol your after. My 750dp is very borderline. My dyno tuner has told me, I may possibly need to go 850dp. They have one sitting there for me but I'll try my luck with the 750dp. Carb wise try using a squarebore and not a spreadbore either. With the squarebore you'll get better throttle response and due to the extra windspeed better performance.

Brenden

XC351 · 10-30-2003, 16:18

What's the prob, head gasket? what sort are you using?