Another Gasser build

Started by slow67, February 25, 2016, 02:00:25 PM

slow67

I can't tell because of the glare, how many lb/min is the he561 good to? I knew the he451 was good to 80lb/min.

65fpvmustang

there in the second picture no glare were you want to look
100lb to 120lbs at a 3.0 pressure ratio

Rx7man

I think if you had that big a turbo on a rotary, you'd benefit from trimming the outside of the compressor wheel a bit... faster spoolup at the expense of peak pressure ratio... Lets face it.. No gasser will take 5:1 PR without being built of unobtanium.

The HX5A looks like it would make a good Big block turbo... Massive air flow but not huge pressure ratio
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

slow67

Thanks! I was looking at the wrong map. ~115lb/min is stout! This turbo looks like a great match (on the compressor side) for a typical small block.

I guess the jury is still out on the turbine side though (that turbine is tiny compared to many modern turbos capable of similar amounts of airflow). I can't seem to find any turbine flow maps on Holsets.

My math says at 10psi (where I will start boost-wise), the wastegate will be open by 4,000 rpm.

65fpvmustang

A gasser built just like diesel or aircraft 4340 steel crank and rods.
With high octane fuel will take the boost.
If you think about it the diesels are the hardest combustion to handle there a detonation engine.
the fastest 2.3 lima i know of runs over 64 psi boost.
Diesel engine will always be king of boost.
In 1909 Dr. Buchi was running 71psig intake manifold pressure on a diesel.

65fpvmustang

Holset turbine flow very well. On my 2.3 with the he351ve running 1to1 is no problem on a log manifold. the he351 has a 60mm comp inducer and 60mm turbine exducer. so your he561 will have no problem doing the same. I'm at least 2 months away from test drive on my big vgt.

My biggest hurdle was getting my home made manifold to take the heat and weight.
I add flex joints to handle expansion and built it all from 304 ss with extra straps to hold the turbos weight.
So far this has been holding up at 30psig boost. my fuel pressure sensor limits me from running higher boost. but i also don't think my stock rods and crank can take much more.

Rx7man

I was referring to the limitation of the fuel because of preignition more than the strength of the internals.  Most boost I've seen was about 45 PSI on race gas.. In a 1.3L rotary it worked out to 875 RWHP.

That manifold was made out of stainless steel steam tubing, which is nice, thick stuff designed for extreme applications
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

65fpvmustang

#22
e85 builds are pushing over 60psi
next time you have good internet speed check this one out blows my mind.
64psi boost 1233hp 2.0L vw golf all wheel drive.
https://www.youtube.com/watch?v=zCKZGsYuZow

slow67

Here ya go. Stock GM block, crank, rods, pistons, and heads (although ported).  40lbs of boost on methanol. I think 2800lbs and a single 88mm. 

SGMP No Mercy 5.  Stock bottom end 5.3. 4.83 - YouTube

65fpvmustang

OK what's your 4.8 going in?

slow67

#25
Its already going (in N/A form).

1981 Chevy C10 Longbed, drive by wire (stock GM PCM), 4L80E (billet input shaft, billet forward hub), 2800 stall (10" Nissan core) triple disk.

Cold A/C, and Flex fuel also.

65fpvmustang

got my actuator mounted he351ve on he5??ve
had to flip arm down to get everything to clear.
Welded extension on turbo for actuator to mount to


65fpvmustang

does your big vgt have coolant ran through your actuator like the he351ve?
My he561 came with freeze plugs where coolant would run.

slow67

The HE451 has plugs and sepwrate coolant paths. I will let you know when the HE561 gets here, it should arrive by Friday.