Efi-turbo Y-block dyno results

Efi-turbo Y-block dyno results

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By Hollow Head - 17 Years Ago

Not a bad day, but lot's of things to improve is ahead Smile

Our single turbo is too small and it generates too much exhaust back pressure. Our 30 lbs / hour fuel injectors are too small too and we had to raise the fuel pressure to compensate that.

Still, 329,5 Hp at only 4900 rpm and 630,3 Nm ( 465 lbs ) of torque at only 2600 rpm BigGrin .

Torque and Hp numbers kept going down as the revs got up and exhaust pressures kept increasing and there was no need to pull more than eight pulls because we didn't get more horsepower out of the mill. But every time we screwed more boost pressure, the torque increased. And we used only 0.7 bar ( 10.3 psi ) boost pressure.

I will post the dyno sheets later and also a link to a short video at youtube after I have made it.

Ok, and we didn't broke anything exept one Crane Xr-i module due false wiring. ( Damn Simo BigGrin )

Here is a video of that session... http://www.youtube.com/watch?v=8yFwrPj8SnU enjoy!

By pegleg - 17 Years Ago

465 foot lbs!!! whoa! Tongue

By 1964fordf100292 - 17 Years Ago

can you share some details on your efi???? what did you use for an intake? was it a factory? Blue thunder? what efi system did you use? please be very specific cause i am planning on efi for my 292 and would like some specifics please. thank you.

By LordMrFord - 17 Years Ago

Hollow Head (12/13/2008)

Ok, and we didn't broke anything exept one Crane Xr-i module due false wiring. ( Damn Simo BigGrin

Soorrryyy!!!!

1964fordf100292 (12/13/2008)

Megasquirt DIY-EFI-system, 30lbs injectors, JAW DIY-wideband, Hollow Head Racing Team aluminum intake manifold by head engineer Seppo Kokko.

By yfreak57 - 17 Years Ago

Ford

Test number	8
Barom [mbar]	1020
Humidity [%]	40
Total coeff	1,022
Fuel S.G.	0,746

	Torque Nm	CTorque Nm	CPower hp	Air temp C	H2O C	temp4 C	OIL p Bar	Boost Bar	Fuel P Bar	EG Press 4 Bar	Lambda 1	Lambda 2	Fuel g/kWh	Fuel l/h

2600	619,4	630,3	229,7	22,9	71,6	29,6	4,8	0,67	4,53	0,62	0,81	0,8	355	45
2700	613,0	623,8	236,1	23,0	71,6	30,0	4,9	0,68	4,54	0,65	0,8	0,79	354	47
2800	607,7	618,4	242,8	23,0	71,6	30,3	4,9	0,7	4,55	0,67	0,79	0,79	362	49
2900	601,0	611,6	248,6	23,0	71,6	30,5	4,9	0,72	4,56	0,69	0,76	0,78	358	50
3000	595,8	606,3	255,3	23,0	71,6	30,7	4,9	0,72	4,56	0,71	0,75	0,78	366	52
3100	590,6	601,0	261,2	23,0	71,6	30,8	5,0	0,73	4,56	0,73	0,74	0,76	365	53
3200	584,3	594,7	267,0	23,0	71,6	31,0	5,0	0,73	4,56	0,74	0,73	0,75	368	55
3300	575,2	585,3	270,9	23,1	71,6	31,2	5,1	0,73	4,54	0,75	0,73	0,74	370	56
3400	565,1	575,1	273,9	23,1	71,5	31,3	5,0	0,72	4,53	0,77	0,73	0,74	375	57
3500	555,8	565,6	277,4	23,1	71,5	31,5	5,0	0,72	4,53	0,78	0,72	0,73	380	59
3600	547,0	556,7	280,6	23,1	71,5	31,6	5,0	0,72	4,52	0,8	0,72	0,72	378	59
3700	539,9	549,5	285,1	23,1	71,5	31,7	5,0	0,71	4,51	0,82	0,73	0,72	382	61
3800	534,0	543,4	289,5	23,1	71,5	31,8	5,0	0,71	4,5	0,84	0,74	0,72	390	63
3900	526,7	536,1	292,8	23,1	71,5	31,9	5,0	0,71	4,49	0,86	0,73	0,73	392	64
4000	519,4	528,6	296,5	23,1	71,5	32,1	5,0	0,71	4,49	0,88	0,73	0,74	396	65
4100	513,4	522,5	300,3	23,1	71,5	32,2	5,0	0,7	4,48	0,9	0,73	0,74	395	66
4200	507,6	516,6	304,3	23,1	71,5	32,2	5,0	0,7	4,47	0,92	0,74	0,74	392	66
4300	502,0	510,9	308,1	23,2	71,5	32,4	5,0	0,69	4,46	0,94	0,74	0,75	385	66
4400	497,6	506,4	312,5	23,2	71,5	32,5	5,0	0,68	4,45	0,96	0,74	0,75	382	67
4500	495,4	504,2	318,5	23,2	71,4	32,6	5,1	0,68	4,44	0,98	0,74	0,75	385	68
4600	493,1	501,9	324,0	23,2	71,5	32,8	5,0	0,67	4,41	1	0,74	0,75	394	71
4700	486,3	495,0	326,6	23,2	71,4	33,1	5,0	0,67	4,4	1,02	0,74	0,75	397	72
4800	479,5	488,1	328,8	23,2	71,4	33,5	5,0	0,66	4,39	1,03	0,74	0,75	403	74
4900	470,8	479,2	329,5	23,3	71,2	34,0	5,0	0,66	4,38	1,05	0,74	0,74	410	75
5000	459,2	467,5	328,0	23,3	70,9	34,5	5,1	0,66	4,38	1,06	0,74	0,74	413	76
5100	447,9	455,9	326,0	23,3	70,7	34,9	5,1	0,65	4,36	1,07	0,73	0,73	427	77
5200	433,6	441,3	322,0	23,3	70,5	35,4	5,1	0,64	4,35	1,07	0,73	0,73	434	78

By Hollow Head - 17 Years Ago

Thanks Jyrkä. And in that chart temp 4 is temperature at intake duct after intercooler and that shows that our intercooler was very effective. Only +35 degrees celsius after eight pulls.

We didn't measure the before intercooler temperatures however.

No detonation issues with 33 degrees of advance at full throttle.

By 57FordGuy - 17 Years Ago

Holy smokes. That thing is cooking! What type of heads, exhaust valves, and header pipe sizes were you running? I am building a blown y-block and have a discussion going in another thread about what size headers to build. Is your flow restriction in the heads, the headers, or both? I am planning to run only about 6 psi of boost through the carburetors so might not see as much restriction as you did.

By Hollow Head - 17 Years Ago

The exhaust pressure is measured under the turbo flange, so the turbo is the biggest restriction. It just doesn't flow enough at the exhaust side and it starts to slow down the engine after 3000 rpm.

Our primary tubes are 1.5 inch diameter from the inside and after the collectors the tube size is 2.5".

The down pipe from the turbo is 3" diameter.

6 psi is for chickens BigGrin . At first I planned to try 10 to 17 psi at the dyno, put I quess it was wise to stay at 10 psi with the totally stock bottom end with cast pistons and 630 Nm of torque?

By GREENBIRD56 - 17 Years Ago

Seppo - Congrats on a great set of runs - you guys are really getting up on your game. The little roadster is going to be a wild ride.........

US guys - the conversion factor for "Newton Meters" to Ft-Lbs is:

Nm x .7306 = Ft-Lbs

By charliemccraney - 17 Years Ago

Sweet! When you guys get all of that figured out it will be very strong.

Then you should put it into kit form.

By 57FordGuy - 17 Years Ago

Thanks for the info. I'm building for street drivability and engine life, so am happy with 6 psi. I think to make more than 6 psi effective rather than reaching diminshing returns, I would have to make quite a few more changes to the heads, etc. to make it flow. I'm keeping it simple and trying not to dodge flying parts! BigGrin

Seriously, it is fascinating to see what you are achieving.

By the way, it just occured to me that I am talking about boost measured in the intake manifold. If I measure boost at the blower outlet, it will be 10-12 psi. The boost in the intake manifold is a closer measure of what is getting into the cylinders (even less than 6 psi) after pressure losses getting through the bonnet and the carbs. So technically, I am speaking about 10-12 psi of boost, but when it is measured in the intake manifold, it is a lot less.

By Hollow Head - 17 Years Ago

Our measuring point for the boost pressure is taken just above the intake runner number eight at the left intake manifold and the other point is just above intake runner number four at the right intake manifold. These two points are connected together and then routed to the boost gauge. 10.3 psi from there.

By yfreak57 - 17 Years Ago

AZ28 (12/15/2008)

The little roadster is going to be a wild ride.........

This combination was in roadster last summer Smile . Now we are looking new frame for it. Do anyone have a good rolling FED-frame or altered on backyard? Tongue