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  • Users: MRDAGERUS
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  1. MRDAGERUS

    Hydraulic Power Steering Racks differences?

    I'd like to add a GM power steering rack on '88 Lotus Esprit turbo (2900 lb gross weight). I'm looking for a suitable part which has similar((+/-) attachment spread/points to the chassis. I found several potential donors, but have difficult time to find a right attachment spread. One of the...
  2. MRDAGERUS

    MagnaSteer power steering rack signal?

    Hi All, I'm considering replacing manual steering rack in my 88 Lotus Esprit with a hydraulic power rack. Whilst investigating possible donors, I found that racks on BUICK ALLURE 2005-2009, CENTURY 2003-2005, LACROSSE 2005-2009, REGAL 2003-2004,CHEVROLET IMPALA 2000-201, MONTE CARLO...
  3. MRDAGERUS

    Suspension dynamics after changing spring length

    I am interested in this: how the rear suspension dynamic or ride properties will change as a result of replacing the existing 14" spring with 12" new spring of the same spring ratio? Suspension type: single longitudinal swing arm w/upper and lower lateral links, single 15 deg inclined coil-over...
  4. MRDAGERUS

    VVIM Plenum Volume in turbocharged 4 cyl engine

    Hello, I'm prototyping a variable volume(NOT variable runner length) intake plenum for t 2.2L 4-cyl turbocharged engine and have a few questions. Analyzing Italia 458 IM design, one can notice 3 various valves showing the proficiency of engine designer in figuring out how to command and...
  5. MRDAGERUS

    18CrNiMo7-6 steel

    Is 18CrNiMo7-6 steel available in US? Which has a better core strength, 9310 or 18CrNiMo7-6 ? CWP (pic) hi-impact application? Mater artium necessitas
  6. MRDAGERUS

    Heat transfer efficiency vs. coolant mass flow rate

    Hello Everybody, Could you tell me if/where I'm wrong? Perhaps, you can point me toward other equations/formulae for heat transfer ratio applicable to air-to-water HE-s? I'm trying to prove someone wrong. This individual insists, that because of the higher coolant velocity (if I use a larger...
  7. MRDAGERUS

    Hi duration/low lift vs. low duration/high lift cam in turbocharged ICE

    There are numerous and often confusing postings throughout the internet on this subject. Not too many on turbo engines/camshafts, though. Let's assume, we have two identical 4 cyl 16V, DHOC engines, boost onset at 3,500rpm, same SLA values and the only difference is in intake camshafts. Both...
  8. MRDAGERUS

    Radial vibration of the cylinder liners in open deck turbocharged engine?

    On Lotus L4 and V8 engines the top of the liner seems to be held in place only by the "nip" of head gasket. Frequent failures of gaskets have been reported, especially on tuned turbo engines. The theory became that failures are related to the liner "panting". Also, experienced builders recommend...
  9. MRDAGERUS

    Independent single trailing arm suspension w/lateral links

    Hi, Could anyone point me in the direction of some paper or analysis of the automotive rear suspension with the following characteristics: - single independent longitudinal radius arm w/rigidly attached hub carrier (knuckle), (NOT 4-link!) - upper and lower, un-equal length links...
  10. MRDAGERUS

    Anti Roll Bar Steel

    I have D=15mm ARB with ~ 100 lb/in stiffness, made of 4130 steel. I would like to make a new 20-25% stiffer bar. I'd like to keep all the dimensions the same, if possible. Would changing to a different steel grade with higher Modulus of Rigidity change the stiffness enough? Going thicker on D...
  11. MRDAGERUS

    Turbo engine Blow Off Valve location, advantages and detriments?

    Gentlemen, When I look at the pictures of BOV installations for small turbo engines, some questions came to my mind. Is the BOV placement in an immediate proximity of the compressor outlet a bit counterproductive? When the BOV valve opens, it creates a reverse flow of the large volume of air...
  12. MRDAGERUS

    Effects of retarding Exhaust cam on the turbocharged DOHC gasoline engine

    Let's consider a 2.5 L, 4cyl, 16v, DOHC, turbocharged, Max boost = 10psig, CIS fuel injected engine(Lotus 910), 7500 red line Where: #1 is a OEM design configuration #2 is a modified configuration,(exh. cam retarded from 104 MOP to 110 MOP), considered for implementation #3 for...
  13. MRDAGERUS

    Empirical determination fo the chassis torsional stifness.

    I'd like to find out what is the torsional stiffness of the chassis/body assembly of the car I'm working on. The engine and transmission is out for repairs. Since the body sits on axle stands already, no engine in it, I'm thinking about proceeding in the following manner: 1. Level it on 4...

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