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Hi, I'm looking for any books or papers that have formulea to calculate flowrates for gear and gerotor oil pump designs. I have run a search on here but that only lead to dead ends. I've searched the SAE database too but the abstracts have not given me much detail and I don't wan't to waste my...

Hi Guys, I currently use NRE rod ends and spherical bearings for some fabricated suspension parts I design/make. I've had no real issues with them but I was wondering what manufacturers other race car builders use. So, who's your favourite supplier? What bearing types do you use and why? Have...

Hi All, I was wondering if there was any information available on dimensioning and tolerancing practices for engine components (gasoline engines)? I need some custom parts made for an engine. I could just leave the tolerancing up to the machine shop but I like to keep detailed records of...

Hi All, I'm helping a small local tuning company develop some aftermarket strut top mounts for a european (UK) car. They are very similar to aftermarket ones by Tein, HKS, etc. as shown below. I'm looking for a supplier for the serration bolts (If that is what they're called) that can be...

Hi All, I'm in the planning stages of a turbocharger conversion of an N/A engine. This is the first time I've tackled one of these as I've only worked on N/A engines before. I need some advice regarding a turbocharger manifold suitable for high performance use. 1. Regarding pipe lengths, is...

Hi all, Im not sure if this is purely a suspension question or powertrain due to conflicting advice on this subject. Basically what causes wheel hop in a fwd car? Is it transmission/engine windup or more to do with the condition of suspension components eg. worn bushes, dampers, etc? Or is it a...

Hi All, I am currently writing a Design Manual for my employers. The chapter I am writing at the moment is on sheet metal design. There is some discussion at work as to what the correct sizes for relief's are in relation to material thickness and in some cases material type. We have also been...

Hi all, Could anyone point me to some formulea or freeware to help me work out the dynamic compression ratio of a normally aspirated engine. I have details on the bore, stroke, chamber size, camshaft duration and opening/closing points. Is this enough information? Basically I'd like to do a...

Hello! My questions concern rear twist beam axles used on fwd vehicles. On a perticular car that I am currently working on the twist beam has four(?) mounting points; two at the front of the beam onto the chassis and one behind each stub axle onto the dampers. The coil spring is in between the...

Hello All, Does anybody here have any empirical formulas for the amount of shrinkage when welding 304 stainless steel. I've looked at the formulas in Lincon Arc Foundations Procedures book but I guess they are for carbon steel as in practice the stainless shrinks alot more. I'm looking to get...

Hi! I am having a few problems being reported to me about the stainless steel fasteners used on a machine currently being built. The fasteners are of A4-70 grade and use nyloc nuts. When they are being tightened up by the fitters some of the fasteners are suffering from thread stripping (on the...

Hi! I am having a few problems being reported to me about the stainless steel fasteners used on a machine currently being built. The fasteners are of A4-70 grade and use nyloc nuts. When they are being tightened up by the fitters some of the fasteners are suffering from thread stripping (on the...

Hi! I am having a few problems being reported to me about the stainless steel fasteners used on a machine currently being built. The fasteners are of A4-70 grade and use nyloc nuts. When they are being tightened up by the fitters some of the fasteners are suffering from thread stripping (on the...

Hi! Need a little help with designing a scraper for my engine.I've been reading some old threads on the subject in this forum but none give the info i am after, that is, what clearance should i give between the crank and the scraper?Is clearance dependent on any factors like oil viscosity? and...

Does anyone know were i can get info on felt seal design?specifically design considerations for the shaft eg; does the contact area need to be hardened?what surface finish/roughness is required? any help will be appreciated eg; books, websites, etc Thanks!